OK, then I will be more specific.
Is there any plans to create a PPC version of imac in MESS.
Notice I say MESS
I still contend that it was a 100 and 10% mistake to combine MESS and MAME which does nothing but turn 20,000 files into 40,000 that need maintaining.
No doubt that will cause an argument as big as BS reasons why Dragons Lair is not emulated on MAME.
The iMac series will be added when someone dumps everything on a board. It needs more than just a BIOS image and install discs. The beige G3 Mac would most likely be the starting point for emulation before MAME moves across to the iMac. The first step is to dump everything possible on the board and submit everything to MAME to be added to a skeleton driver. "I'm a PC," so hopefully it isn't too different, but MAME won't get far with just a BIOS image and Mac OS install discs, it needs everything else, which depending on the hardware may even require a board to be donated and/or sacrificed for the greater good of emulation. I remember reading that Guru was given an iMac some time ago however, don't know which version it was.
Speaking of iDevices, the first iPod would be a worthy candidate for emulation these days.
As for the MAME/MESS merger, that actually reduced the amount of files between the two, as there was a lot of duplicated code (e.g. PlayChoice-10 in MAME and the NES/Famicom in MESS) and in some cases the emulation code was more complete in either MAME or MESS and left forgotten and outdated/incomplete/not working on the other side. MESS was MAME since the first release well over a decade ago, it just didn't have "arcade" machines and less people used it because it didn't support a feature or enhancement or speed-up hack that another emulator used (insert stereotypical PS1/N64 emulator here), or the systems didn't work properly or weren't even emulated at all. MESS was almost always treated as the last resort for emulating anything until it became one as UME and eventually MAME.