How to fix MacBook not starting up after macOS update?

Posted by Vivian to Mac Data Recovery on January 16th, 2019

I started the Mojave update on my MacBook and walked away after pressing "Continue", etc. But after the installation is completed, the computer just won't start up. I have important data on this MacBook. Any thought to save my computer and data?

Installing a new version of macOS on MacBook is as easy as pie. An available update will pop up in the Notification Centre and you can install it with a few clicks. However, things become not so easy if the macOS update brings some problems. Your MacBook may not boot past Apple logo , may not restart, or may even be stuck in black screen. No matter what the situation is, the data on this MacBook is inaccessible. This article will help you recover your data from this MacBook and fix the issue that MacBook won't start up after macOS update.

First things first, recover data from your MacBook

Assuming that you have checked the power cord, adapter and battery, the MacBook still won't start up. As data is easy to be overwritten, you'd better not try any fixes before recovering your important data from this MacBook. To recover data from this unbootable MacBook, you can download professional Mac data recovery software like iBoysoft Mac Data Recovery.

iBoysoft Mac Data Recovery is reliable Mac data recovery software, which is powerful in recovering data from MacBook Pro/Air/iMac and Macs that won't boot after Mojave update and recovering data from formatted/unmountable/unreadable/inacessible hard drives. This program also can recover deleted/lost data from encrypted APFS, APFS, HFS+, exFAT, FAT32 hard drives, external hard drives, USB drives, memory cards, etc. It is compatible with macOS Catalina/Mojave/High Sierra/Sierra and OS X 10.11/10.10/10.9/10.8...

Solution 1: If you have only one unbootable Mac computer

Only have one unbootable Mac computer? Don't worry, you can run iBoysoft Mac Data Recovery in recovery mode on this Mac and recover lost data from it.

Soluiton 2: If you have two Mac computers

Step 1: Download and launch iBoysoft Mac Data Recovery on another Mac computer.

Step 2: Click iBoysoft Data Recovery on the left top of menu bar and select "Create Boot Drive".

iBoysoft Data Recovery create bootable drive

Step 3: Insert a usable USB drive into this healthy Mac computer.

iBoysoft Data Recovery create bootable drive

Step 4: Follow the wizard to create a bootable recovery drive.

iBoysoft Data Recovery create bootable drive

iBoysoft Data Recovery create bootable drive

Step 5: When the bootable drives is created, insert the iBoysoft Mac Data Recovery bootable USB drive into the unbootable MacBook, then press Power button and Option key (⌥) to start the MacBook up.

iBoysoft Data Recovery create bootable drive

Step 6: Select iBoysoft Mac Data Recovery from the boot options.

Step 7: Follow the wizard to recover data from the MacBook.

Next, fix the MacBook that won't start up after macOS update

After recovering data from this MacBook, you are safe to fix it without losing any data. The following solutions will fix Mac not starting up after updating issue.

Solution 1: Boot in Safe Mode

You can use Safe Mode to help resolve issues that might keep your MacBook from completely starting up, and to prevent unnecessary software running when you start up the computer.

Step 1: Press the Power button and hold "Shift" immediately to start your MacBook in Safe Mode.

Step 2: Release "Shift" when you see the loading bar.

Step 3: If your MacBook boots in Safe Mode successfully, restart it without pressing any key.

Solution 2: Repair with Disk Utility under Recovery Mode

If your MacBook can't boot in Safe Mode, try to repair this MacBook under Recovery Mode.

Step 1: Press the Power button and then hold Command + R keys immediately.

Step 2: Select Disk Utility from macOS Utilities and click "Continue".

Step 3: Select the disk that you installed macOS in the left sidebar.

Step 4: Click First Aid to check and repair the startup disk.

Solution 3: Erase and reinstall macOS

If First Aid failed to repair this disk in MacBook, you can factory reset the Mac - erase this startup disk and reinstall macOS. Since you have recovered your important data before, there is no need to worry about data loss.

Step 1: Launch Disk Utility in Recovery Mode like the second solution.

Step 2: Select the startup disk of your MacBook.

Step 3: Click Erase in the top menu.

Step 4: Complete name, format, scheme, then click Erase to reformat it.

Step 5: Return to macOS Utilities in Recovery Mode and select Reinstall macOS.

Step 6: Choose the erased disk and follow the wizard to reinstall macOS.

After reinstallation, you can reboot this MacBook to check if it can start up.

Hope this page will recover your data from this unbootable MacBook, and what's more, fix the issue that MacBook won't start up after macOS update for you.

Still have questions?