How to fix/repair invalid APFS object map error?

Posted by Katrina to Mac Data Recovery Tips on January 20th, 2018

This passage shows you simple steps to fix/repair invalid APFS object map error. If you have important files on the APFS drive, this software can help to easily retrieve lost data from corrupted APFS drive.

"I couldn't mount one of my APFS volumes on macOS High Sierra this morning, so I ran Disk Utility to check and repair it. But I got an error message: "APFS object map is invalid". I searched it on the internet but didn't find a useful answer to fix "APFS object map is invalid" error. Anyone can help me?"

Disk Utility is a Mac build-in tool to manage internal disks and external storage devices. Disk Utility's First Aid is able to detect and repair damaged disk. But it is only helpful to fix minor problem. Such a serious error like APFS invalid object map that First Aid can't repair.

The "APFS object map is invalid" error on macOS Catalina 10.15/Mojave 10.14/High Sierra 10.13 refers to the damaged APFS object map. As APFS object map consists of important file system information, if it is damaged, the macOS fails to recognize the APFS file system. Consequently, the APFS drive cannot be mounted and we are not allowed to access the APFS drive nor the files stored on it.

Two simple steps to fix/repair "APFS object map is invalid" on High Sierra

Since First Aid cannot repair "APFS object map is invalid" error on macOS, to avoid data loss, we have to recover lost data from the APFS volume as soon as possible, and then reformat the APFS drive. Here we recommend you free Mac data recovery software – iBoysoft Data Recovery for Mac.

Step 1: Recover lost data from APFS volume when its APFS object map is invalid on macOS High Sierra

iBoysoft Data Recovery for Mac is the best APFS data recovery software that can recover lost data from APFS volume when its APFS object map is invalid, recover lost data from formatted APFS hard drive, recover lost data from unmountable APFS drive, recover lost data from unreadable APFS hard drive, recover lost data from corrupted APFS drive, recover lost data from encrypted APFS volume, recover deleted/lost APFS partition, etc.

Besides, iBoysoft Data Recovery for Mac can also recover lost data from unreadable hard drive, recover lost data from unrecognized hard drive, recover lost data from corrupted hard drive, recover lost data from unmountable hard drive, recover lost data from inaccessible hard drive, recover lost data from uninitialized hard drive, etc. on macOS 10.14/10.13/10.12/10.11/10.10/10.9/10.8/10.7.

Tutorial to Recover lost data from APFS volume when its APFS object map is invalid with iBoysoft Data Recovery for Mac

1. Launch iBoysoft Data Recovery for Mac.

2. Select the APFS volume whose APFS object map is invalid and click "Next" button to scan lost files.

Recover lost data from APFS volume whose APFS object map is invalid

3. Preview the searching results, choose files we need, and click "Recover" to get them back.

Step 2: Fix "APFS object map is invalid" error on High Sierra by reformatting

After recovering data from the corrupted APFS volume, we can erase this APFS volume to make it work on Mac again.

How to format external hard drive/volumes on Mac?

Still have questions?