Resolve the macOS Sierra 10.12.1 Update Stuck or Failed to Download Issue

Having trouble updating or installing the latest macOS Sierra 10.12.1 on your Mac? Don't panic. In this article, we'll provide you with effective methods to help resolve complex macOS Sierra update errors, such as failed downloads or stuck updates on your Mac. Simply follow the steps and solutions below to easily fix this issue.

Now let's proceed to update and install macOS Sierra 10.12.1 on your Mac without any hindrance or losing any data.

Step 1: Backup important Mac data in advance

To prevent any unexpected data loss issues or problems during the installation of the new macOS Sierra on your Mac, it is highly recommended to create data backups beforehand.

You can simply use Time Machine as a free tool to create a full backup of your important Mac data with just a few clicks. If you don't have backups and accidentally lose data during the installation of the new macOS Sierra update, you can utilize professional Mac data recovery software to retrieve all your lost data.

Step 2: Resolve the issue of macOS Sierra failing to download or encountering an "An error has occurred" message

If your Mac displays an error message stating "An error has occurred" or "Failed to Download" while attempting to download a new update for macOS Sierra, you're not alone. This is a common issue that many users encounter when upgrading their Mac to a new operating system. You can try the following tips to resolve this problem:

Open Launchpad > Delete the "Install macOS Sierra" file with a question mark on it;

Restart your Mac and try downloading the new macOS Sierra update 10.12.1 again.

Click on the Apple Menu, then choose App Store, and within the App Store, click on Update next to macOS Sierra in the Updates section.

Then the new update of macOS Sierra 10.12.1 will be downloaded automatically. Now you can try to install the latest macOS update on your Mac. If the macOS Sierra 10.12.1 installation gets stuck or frozen, skip to Step 3 for solutions.

Step 3: Resolve the issue of macOS Sierra update being stuck or install freeze error

If your Mac computer becomes stuck or freezes during the installation of macOS Sierra 10.12.1, don't worry. You can try the following tips to easily resolve this issue:

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:

Press and hold Power until the Mac turns off > Turn the Mac back on and hold the Shift key > Release Shift when the Apple logo appears > The Mac should now boot into Safe Mode.

Step 4: Download and install the macOS Sierra 10.12.1 update.

Now you can proceed to download and install macOS Sierra 10.12.1 on your Mac. Here's how: 1. Click on the Apple menu in the top left corner of your screen. 2. Select "System Preferences" from the dropdown menu. 3. Click on "Software Update." 4. The Software Update window will open, scanning for available updates. 5. If macOS Sierra 10.12.1 is available, it will appear as an option. 6. Click on "Download Now" to initiate the download process. 7. Once the download is complete, click "Install Now" to begin the installation. 8. Follow the on-screen instructions to complete the installation process. Remember to backup your important data before installing any major updates.

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

Then you can run the macOS Sierra 10.12.1 update and follow the on-screen instructions to easily install the new update on your Mac computer. And don't worry about losing any data if you have created backups in Step 1. If you haven't made any backups and lose data while installing macOS Sierra 10.12.1, don't panic. Next, we'll provide an effective tip to restore lost data due to the macOS Sierra 10.12.1 update.

Tip: Recover lost data after updating to macOS Sierra 10.12.1

Here, we recommend trying professional Mac data recovery software - tools Data Recovery Wizard for Mac, which fully supports all macOS systems, including the latest macOS Sierra 10.12.1, El Capitan, Yosemite, etc. It enables you to recover all lost data due to macOS updates or other reasons in just three simple steps.

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

Notes: You can first create a backup by clicking "Disk Backup" on the left. This way, if the disk becomes damaged or data on the disk is accidentally deleted or lost, you can restore the data from the backup image.

Step 1. Choose the location

Select the disk from which you lost data after updating to macOS Sonoma/Ventura/Monterey/Big Sur, and then click "Search for lost files".

Step 2. Locate lost data after the scan

Data Recovery Wizard for Mac will promptly scan the selected disk volume and display the scanning results on the left panel. Utilize the file type and file path options to locate the desired data on your Mac.

Step 3: Recover Data After macOS Update

Select the target files that were unknowingly lost during or after the update, and click the "Recover" button to restore them all.