I have an original Rev. A Bondi Blue that I installed OS X 10.3 Panther onto.

- Required: Must get more RAM. If you actually want to use the iMac, you must have at least 256 MB. 128 MB will boot but as soon as you load any program at all it will start disk thrashing and it becomes basically useless. 256 MB will let you run one (maybe two) with minimal disk thrashing.

- Strongly recommended: 4 MB VRAM upgrade chip. Lets you run Millions of colors.