Do you receive the message An error has occurred not found (10403) or An error has occurred forbidden (104030) while updating to macOS Sierra 10.12.1? What can you do when the Apple update error 10403 pops up?

Download Mac OS Sierra 10.12.5 DMG Files. If you looking on the internet a Mac OS Sierra 10.12.5 DMG Files So, you come to the right place now a day shares with you a Mac OS Sierra DMG direct download without an app store this Apple operating system with so many new cool features added and all bugs fixed. You can direct updated to High Sierra from the apple store and download from direct link.

Global Nav Open Menu Global Nav Close Menu; Apple; Shopping Bag +. Apple has just made final macOS Sierra 10.12 download available to all after months of developer and public testing, meaning that compatible Mac owners can get their hands on it right now. Apple officially introduced macOS Sierra to the world back in June as part of the opening keynote of this year’s Worldwide Developers Conference. Backup important Mac data in advance: In order to avoid unexpected data loss error or problems.

Actually, Apple update not found 10403 is one of the frequently-asked Mac installation errors. You can take measures to fix macOS Sierra 10.12.1update stuck error with the following solutions.

By the way, you can protect Mac files from data loss because of macOS Sierra installing or updating stuck errors.

Guide List

1. Cancel and Re-download macOS Sierra 10.12.1 Update Pack

Find the software you are downloading. Hold and press Option and Alt keys. Click the Cancel option to cancel a Mac update in progress.

Visit the Mac App Store or the Apple Support site. Search the macOS Sierra 10.12.1 update.

Download and install the macOS update again.

2. Check System Status Page When macOS Sierra 10.12.1 Update Freezes

Visit https://www.apple.com/uk/support/systemstatus/ to access Apple System Status page.

Find macOS Software Update in the list.

Movie maker download for mac 10.6.8. Check the icon’s color. If the icon is green, it means the macOS Sierra 10.12.1 update error is not caused by Apple’s server.

3. Free Up Enough Storage Space for macOS Sierra 10.12.1 Update

The Mac installation error can be caused by the shortage of startup disk storage space too. In another word, you need to leave enough storage space to fix macOS Sierra 10.12.1 update stuck error. You can delete some large files manually, like previous downloaded movies, inactive software and more.

By the way, you can use Mac cleaning software to delete junk files completely.

Make sure there is at least 2GB memory and 8.8GB storage space. Moreover, you need to leave more than 50% battery on your Mac computer. It would be better if you plug Mac into a power source.

Otherwise, your Mac may freeze during the macOS Sierra 10.12.1 update.

4. Update macOS Sierra 10.12.1 in Safe Mode When It Fails

Long press Power to shut down your Mac computer.

How to download flash movies on mac. Power on Mac while holding the Shift key on your keyboard.

Release Shift when you see the Apple logo on the Mac screen.

Sign into your account in the login window.

Reinstall macOS Sierra 10.12.1 update in Safe mode to fix Mac OS update failed errors.

Note: The minimum storage space requirement is 9GB for booting Mac in Safe Mode.

5. Remove Outdated Wi-Fi Preferences If macOS Sierra 10.12.1 Won’t Update

Click any empty space on the desktop. Hold and press Command, Shift and G keys simultaneously.

Type /Library/Preferences/SystemConfiguration/ in the “Go to Folder” window. Then press Enter to go ahead.

Search and deleted those files
com.apple.airport.preferences.plist
com.apple.network.identification.plist
com.apple.wifi.message-tracer.plist
NetworkInterfaces.plist
preferences.plist

Reboot Mac and restart the Wi-Fi router to fix macOS Sierra 10.12.1 update stuck or fail to download error.

If you delete the data accidentally, you can also use FoneLab Data Retriever as a Recycle Bin Data Recovery to get the lost data back with ease.

6. Safe Way to Recover Lost Data after macOS Sierra 10.12.1 Update

Data Loss always comes with Mac update stuck errors. During this time, you can run FoneLab Data Retrieverto recover deleted or lost Mac files without backup. The powerful Mac data recovery software can help you get back videos, music, documents, emails and many other files due to macOS Sierra 10.12.1 update failures. And it also can be your hard drive data recovery, hard drive partition data recovery and more.

Compared with the traditional Time Machine backup and restore method, you can get more customizable filters to scan and recover lost data on Mac. To be more specific, you can recover lost data after macOS Sierra update without overwritten safely and quickly.

FoneLab Data Retriever

FoneLab Data Retriever - recover the lost/deleted data from computer, hard drive, flash drive, memory card, digital camera and more.

• Recover photos, videos, documents and more data with ease.
• Preview data before recovery.
• Recover data from device, iCloud and iTunes.

So calm down when you cannot find important documents, you can turn to FoneLab Data Retriever for help.

1. Recover deleted or lost images, audios, videos, emails, documents and other files in various formats.
2. Recover lost and existing data due to deletion, update stuck, formatted partition, RAW hard drive and other data loss errors.
3. You can recover data from Windows, Mac, memory cards, flash drive, hard drive, digital camera camcorder, etc.
4. Offer Quick Scan and Deep Scan modes to find your file effectively.
5. Available for Mac 10.7 and above versions (macOS Mojave included).

These are all workable methods to fix macOS Sierra 10.12.1 update stuck error. Remember to have a copy of important Mac files before updating. If you forgot to make a backup, you can also run FoneLab Data Retriever to recover any Mac data with ease.

You can also learn more about how to fix Macbook Pro shuts down randomly, recover Mac data external hard drive read-only, USB flash drive not showing up on Mac and more easily and effectively.

FoneLab Data Retriever

FoneLab Data Retriever - recover the lost/deleted data from computer, hard drive, flash drive, memory card, digital camera and more.

• Recover photos, videos, documents and more data with ease.
• Preview data before recovery.
• Recover data from device, iCloud and iTunes.

Related Articles:

Please enable JavaScript to view the comments powered by Disqus.

Cannot update and install latest macOS Sierra 10.12.1 in your Mac computer? Don't worry. Here in this article, we'll offer you effective methods to assist you fixing complex macOS Sierra update error such as fail to download or update stuck issue in Mac. You can simply follow below offered steps and solutions to fix this issue with ease now.

Now let's follow to update and install macOS Sierra 10.12.1 in Mac computer without any obstacles or losing any data now.

Step 1. Backup important Mac data in advance

In order to avoid unexpected data loss error or problems while installing new macOS Sierra in Mac, it's highly necessary to create data backups in advance.

You may directly apply Time Machine as a free tool to full backup your important Mac data with simple clicks.
If you don't have a backups and lost some data while installing new macOS Sierra update, you can try professional Mac data recovery software to get all lost data back.

Step 2. Fix macOS Sierra fail to download or 'An error has occurred' issue

If your Mac shows a error message that 'An error has occurred' or 'Failed to Download' while you are trying to downloading a new update for macOS Sierra. And this has become a common issue that many users have to face while upgrading Mac to a new operating system. And you may follow below tips to fix this issue:

• Open Launchpad > Delete 'Install macOS Sierra' file with a question mark on it;

Reboot Mac and retry to download a new macOS Sierra update 10.12.1:

• Click Apple Menu > Select App Store > Click Update next to macOS Sierra in the Update section.

Then the new update of macOS Sierra 10.12.1 will be downloaded automatically for you. Then you can try to install the latest macOS update in Mac computer now. If you get stuck or frozen while installing macOS Sierra 10.12.1, you can jump to Step 3 to find solution.

Step 3. Solve macOS Sierra update stuck issue or install freeze error

If your Mac computer gets stuck or freezes up while installing macOS Sierra 10.12.1, don't worry. You may try below tips to fix this issue with ease now:

• Disable or uninstall any Anti-virus software on your Mac;
• Ensure Mac computer has a proper and reliable internet connection;
• Install macOS Sierra in Safe Mode:

Hold Power till Mac shuts down > Turn Mac on and hold Shift key > Release Shift when Apple logo appears > Then Mac shall be booted into the Safe Mode.

Step 4. Download and install macOS Sierra 10.12.1 update

Now you can continue to download and install macOS Sierra 10.12.1 in Mac.
How? You can try to get a update in Mac by the follow clicks:

Click Apple Menu > Select App Store > Click Update next to macOS Sierra in the Update section.

Download Error Requires Mac Os 10.12 High Sierra

Or you can directly download it by click below link:
Download macOS Sierra 10.12.1 Update

Then you can run macOS Sierra 10.12.1 update and follow the on-screen instruction to install the new update in Mac computer with ease now.
And don't worry about losing any data if you have created backups in Step 1. If you don't have any backups and lose data while installing macOS Sierra 10.12.1, don't worry. Next we'll offer you effective tip to restore lost data due to macOS Sierra 10.12.1 update.

Tip: Restore lost data after macOS Sierra 10.12.1 update

Here we'd like to recommend you try professional Mac data recovery software - EaseUS Data Recovery Wizard for Mac which fully supports all macOS systems including the newest macOS Sierra 10.12.1, El Capitan, Yosemite etc. It allows you to restore all lost data due to macOS update or other reasons within 3 steps.

Mac Os 10.12 Sierra Download

Just apply this software and follow this tutorial to restore files on Mac now.