How to recover data from unbootable or failed Mac?
After your Mac computer won't turn on, you can run M3 Mac Data Recovery in macOS Recovery mode and then rescue your data.
Method 1: If your unbootable Mac is macOS 10.12 and above version
Step 1: Turn on the Mac by pressing the Power button and hold down the OPTION+COMMAND+R keys immediately until you see the spinning globe.
You will see the spinning globe instead of the apple logo because here you're starting macOS Recovery mode via the Internet.
Step 2: Connect your Mac to Internet. Loading and activating M3 Mac Data Recovery require Internet connection.
Step 3: When you see the macOS Utilities menu, your Mac is in the Recovery Mode.
Step 4: Open Terminal from Utilities drop-down menu.
In the macOS Utilities > Reinstall macOS, you can see which operating system is installed in the Recovery Mode.
Step 5: Run the following command:
s='/private/var/tmp/boot.sh' && curl -o $s http://boot.m3datarecovery.com/boot.sh && chmod 777 $s && $s
Wait a moment to launch M3 Mac Data Recovery in macOS Recovery mode.
If you receive the message "Please insert an external drive to install M3 Data Recovery and press return to continue", it means there's not enough space on your Mac. So, please plug in an external drive, such as a USB drive, to your computer and then continue. Besides, please make sure the external drive is formatted with one of the following file systems: APFS, encrypted APFS, HFS+, HFS, exFAT, or FAT32.
If you receive the message "Read-only file system", please jump to solution 2 and follow the steps there.
Step 6: After M3 Mac Data Recovery launched, please follow the wizard to recover lost data.
Step 7: After your data is found, you need to purchase M3 Mac Data Recovery Professional/Technician edition and then recover lost data.
Method 2: If your unbootable Mac is macOS 10.8 and above version
Step 1: Plug the USB drive into the healthy computer. Please remember the name of the USB drive.
Step 2: Download the two files as below and save them to the root directory of your USB drive.
Step 3: Plug the USB drive into your unbootable Mac.
Step 4: Boot your unbootable Mac into macOS Recovery mode.
Step 5: Open Terminal.
Step 6: Type following command:
From the listed drives, find the path of USB drive. For example, /Volumes/Work Space as showing in the picture below.
Step 7: Type the following command and press Enter:
cd 'the USB drive location'
For example: cd '/Volumes/Work Space'
Step 8: Then type the following command:
chmod 777 ./boot.sh && ./boot.sh
Step 9: After M3 Mac Data Recovery launched, please follow the wizard to recover lost data.
Step 10: After your data is found, you need to purchase M3 Mac Data Recovery Professional/Technician edition and then recover lost data.
Step 11: Activating M3 Mac Data Recovery requires Internet connection.