My Mac Restarts But Does Not Update

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Most of the iPhone iPad iPod iTunes Errors found at Apple's Knowledge Base. Here is a list of iTunes errors that could appear when you restore iPhone, iPad and iPod Touch using iTunes. If the problem still exists after you view this post, please find more details solutions in this post 'Detailed solutions for Apple iPhone, iPad, iPod Touch iTunes Errors'. And 3uTools can help you restore or flash iDevices more effectively.

Symptom When starting your MASCHINE 2 software, the controller freezes and the displays do not react to the software or show only. Update your software - Apple often includes bug fixes with each update, and some may relate to audio. Solve the problem, whereby the Mac does not play. This is the most reliable method to restart your Mac because it does not rely on the Mac OS X operating system. How to do driver update on your Windows.

Error 1
Unable to downgrade. Try changing the USB port (the back one of chassis is better) and restart computer.
The installed version of iTunes may also be too old. Update iTunes.
Error -1
Error occurs when one uses the 'last ditch' method for preventing baseband updates on the iPhone. The baseband does not get updated using this method. Use FixRecovery to kick it out of recovery mode.
Error 2
Sn0wbreeze 1.6 Custom Firmware has a ASR patch problem. Use sn0wbreeze 1.7 or PwnageTool. Device isn't bootable.
Error 6
Not enter the downgrading mode, change USB port (the back one of chassis is better) and restart computer.
Error 9
Due to asr being patched, the SHA signature is automatically changed and after being resigned the kernel will refuse to use it. Therefore proper kernel patches are required. If necessary kernel patches are not applied, it will fail to load asr and error 9 would occur during restore.
Rebooting your PC may resolve this issue. Aslo it can be connection issue.
Error 10
LLB is missing from the IPSW. The device cannot be booted up. The trick to skip the baseband update no longer works.
Error 11
Removed bbfw file in the firmware folder of an unzipped IPSW.
Error 13
Occurs when you want to install a beta firmware with iTunes for Windows (actively blocked by Apple; beta users are developers and therefore must have a Mac).
Error 13 may also signify a USB problem. Check the USB connection and try other direct ports or maybe the USB cable is an older one. Device isn't bootable.
Error 14
Custom firmware update fail (PwnageTool). You have to restore the device with a custom firmware. Update to a custom firmware isn't working. Device isn't bootable. 2
USB Problem. Check the USB connection and try other direct ports or maybe the USB cable is an older one. Device isn't bootable.
Error 17
Custom firmware update fail (sn0wbreeze). You have to restore the device with a custom firmware. Update to a custom firmware isn't working.
Error 18
This occurs when the media library on the device is corrupt and cannot be modified or updated. Updating to the latest version of iTunes and then restoring should resolve this issue.
Error 20
Reportedly happens during failed downgrade attempts, Some have seen success afterwards by doing the downgrade from DFU mode instead of the normal Recovery mode.
Here is a list of iTunes errors that could appear when you restore iPhone, iPad and iPod Touch using iTunes. Error when using Sauriks server for a restore with iOS 5.x in the recovery mode at least on a A5 device. This error can also happen when you try to restore an iPod with hardware dfu. Use iREB r5 to solve this. or You are trying to update to a beta firmware without UDID activation.
Error 23
Baseband Communication error (Hardware), Most probably Baseband chip is faulty.
Error 26
False version of the NOR flash firmware. Use the correct sn0wbreeze version.
Error 27
modified the restore.plist so it would flash and also exchanged RestoreRamDisk and kernelcache. restore the original iOS.
Error 28
The problem is a bad dock connector on the iPhone. Must change the connector. If you have tried almost everything, reset the logic board leave uncharged for 2-3 days or remove battery for an hour. If doesn't work, the flash memory is damage .
Error 29
You might need to change the battery.
Error 31
DFU Loop, Sometimes during the restore with your messed-up IPSW, iTunes will return error 31. This is what's referred to as a DFU loop. The only solution is to restore a working firmware.
Error 34
Hard disk is run out of space when trying to download. Clear space and then continue downloading.
Error -35
Error when downloading songs purchased on iTunes, See
Apple's KB article.
Error 37
iPod touch 2G LLB patched with the 0x24000 Segment Overflow was used on an iPhone 3GS custom firmware. Known on damaged bundles from unofficial PwnageTool distributions or bundles.
Error 40
Hacktivation bug in Sn0wbreeze, Use update one..
Error -50
Delete Storm Vedio, QuickTime, iTunes, then reinstall iTunes. See also
Apple's KB article.

Error 1002
Are you restoring to a stock apple firmware or a custom pwn firmware? Either way make sure you are in DFU mode first.
Error 1004
This is caused by a failure to match the Baseband Nonce currently in memory to the Nonce returned in the BasebandFirmware SHSH blob. This is a normal part of iPhone 4 local restores via TinyUmbrella.
Error 1011
The file iTunesMobileDevice.dll is damaged or updated.
Error 1013
Restart computer; change computer; reinstall system, if iPhone is always in restoring mode: XP users can jump from restoring mode with ibus; MAC users can use iNdependence. (usually on the iPhone with 1.0.2 firmware downgraded from 1.1.1)
Error 1014
This error is down to itunes not liking your USB ports on your computer. Use a different USB slot or a different computer if possible. That is the easiest fix!
Error 1015
Restart computer; change computer; reinstall system, if iPhone is always in restoring mode: XP users can jump from restoring mode with ibus; MAC users can use iNdependence. (usually on the iPhone with 1.1.1 firmware downgraded from 1.1.2) Baseband firmware on the IPSW is higher than the baseband firmware on the iPad/iPhone.
Error 1050
Bad response from OR need iREB for preparing the device for restoring to custom IPSW
Error 1394
When Spirit2Pwn flashes parts of the boot chain on iOS 4, the device may crash into DFU Mode.
Error 1413
Restart computer; change USB port; reinstall system. See also
Apple's KB article.
Error 1415
Restart computer; change USB port; reinstall system.
Error 1417
Restart computer; change USB port; reinstall system.
Error 1418
Restart computer; change USB port; reinstall system.
Error 1428
Restart computer; change USB port; reinstall system.
Error 1600
Custom firmware can't be restored on a device with DFU Mode. Use Recovery Mode.
Error 1601
Completely remove iTunes and Apple Mobile Device support and then reinstall iTunes
Error 1602
Restart computer; change computer; reinstall system.
Error 1603
False kernelcache patch. Known on damaged bundles from unofficial PwnageTool distributions or bundles. See also
Apple KB article
Error 1604
Device was not pwned (signature checks were not blocked). Custom firmware can't be restored.
Error 1611
iTunes tried to enter the Restore Mode, but the device turned back to the Recovery Mode.
Error 1618
Missing system files or corrupt data in iTunes installation. Try to uninstall iTunes, restart computer, install again. This error also occurs for iTunes in Windows 8 for reasons currently unknown.
Error 1619
iTunes is too old and couldn't read the iPhone in Recovery or DFU Mode. Please update iTunes and try it again.
Error 1644
IPSW was moved during prepare with iTunes. Try it again and don't move the IPSW.
Error 1646
iTunes expected the device to be in a different state (Example: booted into iOS rather than jumping to iBEC).
Error 2001
The Mac OS X kernel extension 'IOUSBFamily' that was bundled with late 2008 / early 2009 MacBooks, has a bug where it fails to properly recognize an iDevice in DFU Mode. It can be resolved by updating to 10.5.7 (or later), or using a USB hub.
Error 2002
iTunes can't connect because another program is using it or it's disconnected during the Apple Server check.
Error 2003
Connection problem; change USB cable and check USB port.
Error 2005
Problem connecting. Probably a hardware failure.
Somebody reported that reinstalling the USB drivers fixed the problem.
Error 2006
Replace the USB cable with a newer one and/or disconnect all other USB devices, then retry.
Error 2009
remove all USB devices and spare cables other than your keyboard, mouse, and the device, restart the computer, and try to restore.
Error 3XXX
iTunes can't connect to Maybe Port 80 and Port 443 is blocked. Open it on your router.
Error 3002
Update to an older firmware isn't working, because Apple is no longer handing out SHSHs for the device/firmware combination.
Error 3004
No internet connection during the firmware restore.
Error 3014
False edited hosts. The SHSH request couldn't be completed. No connection to the Apple Server, Sauriks Server or localhost.
Error 3123
Something dealing with movie rentals.
Error 3194
Right-click on QuickTimePlayer.exe choose Properties from the shortcut menu click on the Compatibility tab. Deselect the checkbox labeled “Run this program in compatibility mode for..
Error 3194
Occurs when trying to install an old firmware and Apple's server disallows the installation. The only solution is to have SHSH backup and modify the hosts file to point to Saurik's Cydia server where they are backed up (or localhost if you have it yourself).
Error 3195
'An internal error occurred.' Missing SHSH for the firmware. Maybe the same as 'This device isn't eligible for the request build.' but with an cache error.
Error -3198
Error downloading, try again. or This device isn't eligible for the requested build.
Error 3200
You are trying to update to iOS 5, when infact, the IPSW file has only a Restore Ramdisk.
Error -3259
Connection timeout, try again.
Error -5000
There is a problem with the permissions of the Mobile Application folder. The App you've tried to download in iTunes couldn't be saved.
Error 9008
Error downloading, try again.
Errors 9800
Set exact date, restart computer. See also
Apple's KB article.
Error 9808
Computer system time incorrect.
Error 9812
Check system time, reset Internet connection, update root certificates.
Errors 9814
Set exact date, restart computer. See also
Apple's KB article.
Errors 9815
Set exact date, restart computer. See also
Apple's KB article.
Error 9843
This error happens if you are logged out, try to download something from the iTunes store and if you click on 'Download' and enter an account, which doesn't have this article, this error will occur.
Error 11222
internet options Connections tab Click
LAN Settings uncheck 'use a proxy server'
Error 11556
You're trying to access a section or a functionality that is not available in your country, for example iCloud in some countries.
Error 13019
Seems to be an issue with syncing media to the device.It only seems to happen on jailbroken devices. Create new user, try syncing with new user's library.
Need restore the device....
Error 20000
Is caused by a custom theme pack on your Windows. Use default Theme.
Error 20008
This happened on a Mac with TinyUmbrella running before restoring a firmware to the Apple TV.
Device was suddenly unplugged. iTunes couldn't connect with the device. Try it again.
Error in your firmware files. Restore.
IPA signature verification failed.
False permissions in the Carrier Bundle folder. Restore, update or fix the permissions from the carrier bundle to update the carrier settings via iTunes.
Device was suddenly unplugged. iTunes couldn't connect with the device. Try it again.
sn0wbreeze custom cirmware error on USB connection. Unplug the device, reboot it, and plug it in again.

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Installing a new version of the macOS is not as difficult as you might think. More often than not, your Mac will tell you if there is an available update via popup notifications. In some cases, the update will be downloaded directly on your Mac. It’ll just wait for you to initiate the installation process. Though it rarely happens, there are times when the entire macOS update installation process gets stuck or frozen. If you get caught in such situation, fear not because we made this guide to help you get through, but before we proceed with the steps you have to take, allow us to enumerate the possible reasons why your macOS update installation is stuck.

Why macOS Installation is Stuck

There are many possible reasons why the macOS update installation is interrupted. One is that the power may have been cut off in the middle of the update. Another reason is that there might be no sufficient space on your Mac or there are other hardware issues with your Mac that need to be checked and fixed before updating. Hence, it is always a great idea to run a system check before performing an OS update on your Mac.

Why the macOS Update Can’t Be Downloaded

Now, if your Mac can’t download the update, here are a few things you should try:

1. Check the server of Apple.

Often, when Apple releases a new update, many people will want to download it, which causes issues with Apple’s servers. So, the first thing you have to do if you ever want to try downloading the update is to check the System Status page of Apple to know if there are any known issues with the macOS software update.

Pro Tip: Scan your Mac for performance issues, junk files, harmful apps, and security threats
that can cause system issues or slow performance.

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2. Connect to the Internet via a wired connection.

Sometimes, downloading becomes faster if you connect to the Internet via wired connection than a WiFi.

3. Try to cancel the macOS update download.

There are times when the solution to a stuck macOS update can be found on the Mac App Store. First, you have to find the software update you are downloading. Next, press the Option or the ALT key. At this point, you should see an option that allows you to cancel your download. If you cancel the macOS update download, you can start over again. By attempting to restart the download, hopefully, no problems will be encountered.

4. Download the update from Apple’s support website.

If you are having problems downloading the macOS update from the Mac App Store, you may go to Apple’s website instead. Go here if you want to stay in the loop for any software update for your Mac.

How to Know if the macOS Update Installation Has Stalled

In most cases, if there is a problem with the installation process, your screen will display an Apple logo with a status bar indicating the progress of the software. And then, there is this little graphics that people call the “spinning beach ball.” Often times, you may also see a grey, white, or black screen. For some Macs, the screen becomes so dark that one might not be able to tell if it is switched on or not. Before you force reboot your Mac due to a frozen macOS update installation, be sure the installation is no longer running in the background. Otherwise, you might lose all your valuable data. Better yet, check out the handy tips we have for you below:

1. Check if your Mac is really stuck or frozen.

For you to be able to conclude if your Mac is stuck or frozen during the installation process, you have to check a few things. There are times when the update takes very, very long that you might be forced to believe that the macOS update installation is stuck. If you give it a few more hours, it might end up completing the update. To avoid being caught in situations like this, it is better to perform the upgrade at night, so you can just leave your Mac overnight to get the task completed.

Believe it or not, updates may often take 16 hours or more to complete. This is especially true if Apple has just released the latest version of their Mac OS. Take note that the progress bar will only give you a rough estimate on how long the installation will take. Usually, it will initially show that the process will only be a two-hour wait. Eventually, it will add 30 minutes, another hour, before it finally jumps down to 15 minutes. Just be patient and give your Mac enough time since it is doing its best to try and install the update as quickly as possible.

Why Won't My Mac Restart

2. Check the Log to know if your Mac is still installing the update.

To check the Log, just press Command + L. You should then see all critical information and details regarding the amount of time needed for the installation. It may also give you an idea about the files that are being installed and the remaining time left.

3. Be patient and wait.

If you think that the installation is not stuck, have patience and wait for the process to be completed.

How to Fix a Frozen macOS Update

Now, if you are sure that your Mac is not responding to the macOS update installation, then we recommend you follow the steps below:

1. Shut down your Mac. Wait a couple more seconds before restarting it.

First, press and hold the power button to switch off your Mac. Give it time to cool down before restarting it again.

2. Check the Mac App Store and inspect Updates.

If you were installing an app when the update installation got stuck, go to the Mac App Store and hit Updates. Here, you will see the updates or installation processes that have been paused or stopped.

3. Check if files are being installed by showing the Log screen.

Once the progress bar appears, press the Command + L keys to ensure the files required for the installation of the update are there. If the Log screen tells you that nothing is happening, proceed to the next step.

4. Install the Combo updater.

We mentioned that the Mac App Store is not the only place to find a macOS update. Apple also hosts a macOS update on their website. So, you can try to download from there. We highly recommend getting your OS update from Apple’s website if you are having problems with the installation. Why? That is because the version available on Mac App Store often contains only the files required to update your Mac.

If you get the OS update from Apple’s website, you can download the Combo updater, which already includes all the files needed to update your Mac and its OS. The version you can download from Apple’s website can replace all your system files, ensuring a successful update.

5. Perform the installation in Safe Mode.

Running your Mac in Safe Mode while performing the OS update sometimes helps prevent problems with the installation. To start your Mac in Safe Mode, press the power button while you hold down the shift key. Next, go to the Mac App Store and start updating your apps. Finally, reboot your computer.

6. Clear valuable storage space.

If the installation doesn’t push through because there is no sufficient storage space available, then you might need to delete unwanted files and trash on your Mac. You can use tools like Outbyte MacRepair for this.

7. Reset your NVRAM.

If running your Mac in Safe Mode does not solve the problem, try restarting your Mac and holding down the following keys: Command, Option, P, and R. Doing this will reset your NVRAM. After that, wait for your Mac to restart. Check if it resumes with the update installation.

8. Run your Mac in Recovery Mode and attempt to reinstall macOS.

Your final resort is to restart your Mac in Recovery Mode. To do that, hold down the Command + R keys during startup. You will then be presented with some options. You may recover your Mac from your most recent Time Machine backup. You may also perform a quick disk repair. However, we suggest you select the Install New OS option.

My Mac Restarts But Does Not Update

Choosing the Install New OS option will overwrite any problematic files with the correct ones. Unfortunately, this won’t include the most recent version of the OS. So, you might need to check and apply any latest software updates manually.

9. Install the newest macOS update from an external drive.

If you still experience problems with installing the macOS update, try installing the upgrade from an external drive.

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10. Make it a habit of running Disk Utility after the update.

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Just because the update installation is completed does not mean you have nothing left to do. We recommend that you run Disk Utility to ensure there are no other issues that can cause problems in the future.


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We hope that this guide helped you fix your problems with a stuck macOS update. The key here is just to have patience. Give your Mac enough time to complete the installation. If all else fails, then you might have to find some quick fixes and solutions, which we believe we have also given above.

If you’re running into errors and your system is suspiciously slow, your computer needs some maintenance work. Download Outbyte PC Repair for Windows, Outbyte Antivirus for Windows, or Outbyte MacRepair for macOS to resolve common computer performance issues.Fix computer troubles by downloading the compatible tool for your device.
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