I am trying to recover files off of a Mac OS internal hard drive that got updated. I have the drive plugged in externally at the moment to avoid over writing anything further. The program I'm using requires the signature and offset in order to add a custom file type to the recovery search list. The files i'm trying to recover are from several programs that have unique extensions (affinity photo, affinity designer, scrivener, and some other Mac apps) Any idea how I can find this for such an uncommon filetype? or how to read the Hex code in order to get the offset and signature?
Software/Hardware used: Mac OS, Mojave, Remo recovery, Affinity designer, Affinity photo, Growly notes, logic pro X, scrivener,