@mitu it's the macintosh folder, and here's the contents:

-rwxrwxrwx 1 pi pi 0 Nov 15 02:31 Desktop -rwxrwxrwx 1 pi pi 209715200 Nov 20 11:22 disk.img drwxrwxrwx 1 pi pi 131072 Nov 19 13:41 .finf -rwxrwxrwx 1 pi pi 1048576 Sep 14 2010 mac.rom drwxrwxrwx 1 pi pi 131072 Nov 19 13:41 .rsrc -rwxrwxrwx 1 pi pi 0 Nov 19 09:18 start.txt

Inside of the .finf directory appears to be a duplicate (symlinks?) of the macintosh directory:

-rwxrwxrwx 1 pi pi 32 Nov 20 11:22 Desktop -rwxrwxrwx 1 pi pi 32 Nov 19 11:38 disk.img -rwxrwxrwx 1 pi pi 32 Nov 19 11:38 mac.rom -rwxrwxrwx 1 pi pi 32 Nov 19 13:41 start.txt

Inside of the .rsrc directory has another Desktop and start.txt file:

-rwxrwxrwx 1 pi pi 321 Nov 18 23:32 Desktop -rwxrwxrwx 1 pi pi 0 Nov 19 13:41 start.txt

I checked the start.txt files and they are both empty, so it must be in the basiliskii.cfg or other config file to dictate which backend it's using, and maybe if I'm lucky... I can manually define my resolution there? And maybe I can clean up the "start" listings and/or rename that? Can you point me somewhere to teach me about the use of start.txt files in RetroPie? I can't seem to find it in the docs.