imac G5, CPU 1.9Ghz,
ati radeon x600 pro 128vram
mac os x 10.4.11
willing to accept minimal mhash/s and just leave to do its thing
No GPU mining on that, so it would just be your cpu, which might earn you .001 a day for twice that in electricity, and many pools would kick you for low efficiency. You could make more money mining aluminum cans living in a van down by the river.