Mac Mini

Dont know.Mine is sitting in a rack made out of black walnut back in the 80's.Its dead quiet and works/sounds real good.Using it with a Bel Canto USB Dac and they are side by side.Haven't moved them in the 18 months I've had them.I hope your as satisfied as I am with the unit.Good luck,Bob......oh,check out computeraudiophile.com if you havent already.

Have you ever been working on a complex spreadsheet when the cat jumps off a chair onto the floor, and you look at the cells in your spreadsheet and all the values are totally messed up? No?? Me neither.

Remember, it's a computer, not a turntable. Unless you're extremely concerned about your Mini outputing "shaky" zero's and one's, I don't think you need to be too concerned about an isolation platform.
-

I have Vibrapods under mine. Works fine.

Anything that spins, vibrates. Cat or no cat. Reduced vibration equals better sound.

For something inexpensive, try a bamboo cutting board (I like these), any of Herbie's Audio Labs footers (always a good deal), or the Vibrapods as mentioned. Even a foam mouse pad would work well. You could also try a cork floor tile, which would be another good material to dissipate energy.