Thanks, I don't know what went wrong the backups clrmame did but your files work perfectly fine.
Some related info about that here: [You are not allowed to view links]
I have not confirmed that the "freeze" issue was related to the seemingly missing mac ROMs. Using ROMVault, I was able to "find" the missing mac ROMs by including the base 0.179 MAME set. Somehow the WIP version of the MAME set had lost track of them.
These mac ROMs weren't really new, they were just reorganized internally. Split-up, re-joined, byteswapped, de-interleaved, re-interleaved, whatever...