Ample release 10 MAME includes the Macintosh (NuBus) driver and UI support for configuring and launching some Macintosh models.
Please note the following warning concerning MAME's Macintosh emulation:
Mac emulation is still in progress. While many features work, some are not in place yet, and others are a consequence of accurate Mac emulation.
* 3.5" floppy support is a work in progress and currently only works with 400K/800K disks (to be fixed in the future)
* Images selected in the “Hard Drives” section must have a full partition table with Mac drivers (this will always be the case)
* "Hard Disk Images" (enabled with the NuBus Disk Image Pseudo-Card in a slot) can be used to mount standard HFS images without the need of a partition table or driver (this will always be the case)