Some of my MacMAME faves
SWAT (played tons in the Alladin's castle - took me decades to remember the name/game. Used to search klov one game at a time to try and find!)
Pang/Buster Bros.
BurgerTime
Rompers (Rhett - this would work awesome on your system. Really cool puzzle/action game.)
Amidar
Others in green...
10 yard fight
Astro Invader
Bank Panic
Carnival (played to death in a motel one weekend - will never get tired of it)
Circus Charlie
Cloak and Dagger
Columns
Cabal
Donkey Kong 3
Dragon Breed
Frogger (awesome with arrow keys!)
Go Go! Mile Smile
Gorf
Gyruss
Jail Break (My first full upright purchase! Check out the proud pappa pic on my myspace profile!)
Journey
Kangaroo
LadyBug
Moon Patrol
Mr. Do!
Pooyan
Pop 'n Bounce
Popeye
PuLiRuLa
Puzzli
Qbert
Qix
Quiz & Dragons
Raiden
Rally X
Satan's Hollow (Rhett!)
Sea Wolf
Sky Diver
Syusse Oozumou (Freakin awesome sumo wrestling! Rhett - another one for you!)
Tapper
The Speed Rumbler
Timber
Time Pilot
Time Pilot 84
Wizard of Wor
Xevious
Eyes (Rhettable)
Ponpoko
Dr. Toppel's Adventure (awesome scrolling vertical shooter with a weird dragon breed/gradius following helper system)
Prehistoric Isle in 1930
Rolling Thunder
Phew! That's a lot, and not exclusive. I tried to throw in some that people might not have heard of, and tried to only include the classics I only truly love.