How to fix/repair invalid EFI jumpstart record error?
A few days ago, my Mac suddenly shut down. Now I am neither able to boot the system, nor to mount the disk to read it from Recovery when booting as an external drive. It turned out that there is a problem with the EFI jumpstart record. When checking with Disk Utility, I got the result that "EFI jumpstart record is invalid". I tried to create a disk image for it, but I am having the same problem when trying to mount it. Is there any idea on how to solve this issue, or at least on how to access and save the data?
First Aid is quite helpful when there are minor errors on our Mac and can help fix errors. But when there are serious damages on our drive, First Aid can no longer get rid of those errors. One of the serious errors that we may meet when checking with First Aid is 'EFI jumpstart record is invalid' error.
EFI is one important part of an APFS drive. It is similar to the partition table of a drive, which contains some fundamental information of the drive. At most of the time, when EFI jumpstart record becomes invalid, the APFS partition will be lost. Although this is quite serious a problem, we have find an easy method to fix it.
Simple steps to fix/repair invalid EFI jumpstart record error
To avoid data loss, what we should do firstly is to recover data from APFS drive whose EFI jumpstart record is invalid, and then fix the APFS drive by reformatting.
Step 1: Recover data from APFS drive whose EFI jumpstart record is invalid with iBoysoft Mac Data Recovery
iBoysoft Mac Data Recovery is a APFS data recovery software that can recover data from APFS drive whose EFI jumpstart record is invalid, recover deleted/lost files from APFS drive, recover data from formatted APFS hard drive, recover data from unmountable APFS drive, recover data from unreadable APFS hard drive, recover data from corrupted APFS drive, recover lost data from encrypted APFS volume, recover deleted/lost APFS partition, etc.
Besides, iBoysoft Mac Data Recovery can also recover lost files from drives formatted as other formats (FAT32, exFAT, HFS+), recover data from formatted, unmountable, unreadable, corrupted hard drive, external hard drive, USB flash drive, SD card, pen drive, etc.
Tutorial to recover data from APFS drive whose EFI jumpstart record is invalid with iBoysoft Mac Data Recovery
1. Launch iBoysoft Mac Data Recovery.
2. Select the APFS container which has "EFI jumpstart record is invalid" error and click "Next" to start scanning.
3. Preview scanning results, choose files we need, and click "Recover" to recover files.
4. Go through to ensure we have got all lost files back.
Step 2: Repair "EFI jumpstart record is invalid" error by reformatting
After getting lost files back, we can fix the APFS drive whose EFI jumpstart record is invalid by reformatting it.
1. Launch Disk Utility.
2. Select the APFS container which has "EFI jumpstart record is invalid" error on the left part of the window.
3. Click Erase on the top of the window.
4. Complete related information (name, format, scheme), then click Erase.
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