If I try to fix it in Disk Utility I get the same error:
The issue is the same as described here, imager_1.4 - "corrupt image" on OS X 10.9.5, and no solution is provided, other than using
Note that this fails on 10.8.5 and 10.9.5 but works on 10.13.6 - I haven't tested on anything in between.
FWIW, I've tried repairing the image in Disk Utility, hence the error shown above, as well as this Q&A on SU, Unable to open DMG files - "Corrupt Image", which is as equally ineffective.
Does anyone know why the disk image fails to mount? Is there a way of getting it to mount? Or another source of an uncorrupted image?
If you mount the disk image on 10.13.6 and then copy the binary to 10.9.5 (just to test if the binary will actually work), then upon running the imager binary, it fails with this message: