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MAME OS X picked up where MacMAME had left off. The final MacMAME version was 0.103u2 for PPC-only, whereas the initial release of "MAME OS X" was version 0.109 Universal Binary. Regarding the ui, this program "started from scratch" reinvented the wheel so to say, and the earliest versions of MAME OS X were littered with crashes, bugs, and lacking features. The two versions here are the only ones we might want to play with; they are the two most recent versions, as nothing was released between them, and updates ceased after v0.135 was released a long time ago.
These two MAME versions have many differences.
The format of the cheats database differs (ascii in 0.124 vs. xml in 0.135). One database cannot satisfy both these app versions. And app v0.124 is very slow at parsing the cheats db, many seconds wasted every time any game launches with cheating possible.
Ability to use cheats database is broken in MAME OS X v0.135 and Release Notes fails to describe the necessary work being put in.
Many ROM files aren't compatible. When I moved from old MacMAME 0.103 into this MAME OS X 0.124 around 10% of my ROMs collection needed updating. I did each one manually myself, and the nice result was my one ROM library can be used in both apps 0.124 and 0.103 - next when I moved from 0.124 to 0.135 an additional 20% of my ROMs needed updating, including the entire NeoGeo series. I found that half the bad ROM files only needed renaming. v0.124 had restricted filenames to 8 chr, v0.135 introduced allowing 9 or more chr. Typically the ROMs needing to be renamed are 8 chr clones of 8 chr parents, especially when the 8 chr results ended up being out of alphabetical order, and its new 9 chr name puts them in order. Down to 10% ROMs needing help, i found that half again the bad ROMs were easy to fix by just replacing that one NeoGeo bios file. The leftover 5% I repaired individually manually, and now I am running every title in a 230 ROM collection from within MacMAME 0.103 (the highest version for OSX Jaguar), MAME OS X 0.124 & MAME OS X 0.135 ... it can be done.
(23.69 MiB / 24.84 MB)
Version 0.124 (April 23 2008) / DMG image
(26.05 MiB / 27.32 MB)
Version 0.135 (November 15 2009) / DMG image
(1.37 MiB / 1.44 MB)
Cheats database v0.126 / Zipped
(260.64 KiB / 266.9 KB)
Neo-Geo plugin for v0.124 (and older). To use it, do NOT unzip. Backup and remove any other "neogeo.zip" file in your ROMs folder; rename this file to become "neogeo.zip" in your ROMs folder. / Zipped
(1.7 MiB / 1.78 MB)
Neo-Geo plugin for v0.135 (and newer) / Zipped
(106.8 MiB / 111.99 MB)
(1.3 MiB / 1.36 MB)
Cheats database v0.123 / Zipped
From Mac OS 10.4