How to recover lost/missing files after Mojave/High Sierra update?

Yesterday, I updated to macOS High Sierra 10.13. After updating, I found that my important documents and photos were disappeared. I don't know how to recover them. Please help me!

Since Apple released the latest operating system, which is named "macOS High Sierra" with higher usability and safety, many Mac users want to update to macOS High Sierra 10.13. However, many users complained that they lost some photos, videos, documents after updating. How to recover lost/missing files after Mojave/High Sierra update? Don't be too nervous and just read on.

Recover lost/missing files with a Mac data recovery software

M3 Mac Data Recovery is a professional Mac data recovery software which can recover deleted/lost files, recover data from formatted, unreadable, unmountable, corrupted drive, external hard drive, USB drive, flash drive, memory card, SD card in macOS 10.14 Mojave/10.13 High Sierra/10.12 Sierra and Mac OS X 10.11/10.10/10.9/10.8/10.7.

Besides supporting HFS+ file system, M3 Mac Data Recovery is fully compatible with APFS and encrypted APFS drive.

Tutorial to recover lost/missing files after Mojave/High Sierra update with M3 Mac Data Recovery

In order to maximize the chance of getting lost data back, you need to stop using that drive immediately. Every time disk writes happen, they could be overwriting your lost data in startup drive, making it impossible to recover.

Step 1: If you have an external drive, please download M3 Data Recovery to this external drive, instead of your Mactonish HD, otherwise, there is no way to recover lost/missing files once they are overwritten by new data.

Step 2: Please double click M3 Mac Data Recovery installation file.

Step 3: In M3 Mac Data Recovery installation window, please double click M3 Mac Data Recovery icon to directly run it, instead of dragging M3 Data Recovery to Applications folder.

Install M3 Mac Data Recovery

Step 4: Select the Mactonish HD and click Next to scan lost/missing files.

Scan lost data with M3 Mac Data Recovery

Step 5: After the lost/missing photos, videos, documents are found, you can preview and check if they can be recovered at all.

Scan lost data with M3 Mac Data Recovery

Step 6: Select the lost/missing photos, videos, documents, etc. and click Recover. After that, please select an external drive to start recovering the lost/missing files.