I spotted this on the internet somewhere (wish I could remember where, so I could point to it)
When you get Aperture, and install it, it’ll let you install it, if you don’t have enough RAM, but it won’t run, and will give you an error saying something like “This machine doesn’t have the minimum resources to run this application” (I haven’t seen it, so I don’t know what it says).
To get it to work do this:
open the file
info.plist(inside the Aperture.app bundle)
and change this
The above hack lowers the RAM requirement from 1 GB of ram to 700 MBs of RAM. I bet you could play with those numbers to see how low you can get it and still get Aperture to work. Something tells me though that Apple wasn’t bullshitting when they say the application needs 1 GB of RAM, so if you have less, be careful with this hack.
It goes without saying this hack is totally unsupported by myself and/or Apple. Your mileage may vary.
update: a few searches on Google lead to these other posts that might help you get Aperture running on unsupported hardware: