Skip to main content

Failed to create bootable media - Failed to find BaseSystem.dmg

Thread needs solution
Beginner
Posts: 1
Comments: 0

I have Mojave 10.14.2 installed on my Macbook Air and I use Acronis True Image 2017 for Mac.

I want to create a rescue media. I already have an old media with Acronis 2015 and OS X Yosemite. When I run the Create rescue media in Acronis 2017 I get an error.

Looking for version 10.14 of BaseSystem.dmg
Failed to find BaseSystem.dmg of version 10.14
2019-01-07 07:53:58:157 123145497702400 E00000000: Error occured, linetag: 0x97b6a0c7fffb772b, /private/bs_hudson/workspace/ATIH-imager-mac-20-u2-release_swiss/8035/builder/mac/impl/media_builder_mac.cpp:326, GetSourceUri
2019-01-07 07:53:58:158 123145497702400 E00000000: Failed to create bootable media, because OS X Recovery does not exist or its version mismatches the OS X version. If you have OS X Recovery stored on an external hard drive, plug in that drive, and then try again.

I'm however able to boot into recovery mode using Cmd+R and I do see Install OS which starts Mojave installation. I also see that Recovery partition exists on my main drive when running diskutil list.

Do you have any suggestions how to check what is wrong and how to fix it?

Where should be BaseSystem.dmg located? How I can I check its version?

diskutil list output

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         121.1 GB   disk0s2

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.1 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            91.5 GB    disk1s1
   2:                APFS Volume Preboot                 46.6 MB    disk1s2
   3:                APFS Volume Recovery                517.1 MB   disk1s3
   4:                APFS Volume VM                      3.2 GB     disk1s4
0 Users found this helpful
Forum Moderator
Posts: 109
Comments: 4179

Hello Milan,

welcome to Acronis forums!  

The possible cause of the issue could be different versions of the Mac OS and the recovery HD. Please make sure the recovery HD on your Mac is also of 10.14.2 version (see https://apple.stackexchange.com/questions/217601/how-can-i-tell-what-version-of-recovery-hd-os-is-running-while-im-booted-to-the

Alternatively, you can download the files from another Mac with 10.14.2
/com.apple.recovery.boot/SystemVersion.plist
/com.apple.recovery.boot/BaseSystem.dmg

and copy to the Mac where you want to create the bootable media.

Note: Mojave (10.14) is officially supported only starting with Acronis True Image 2019, earlier versions have not been tested and are not guaranteed to work with Mojave.