That is weird because it ran in classic mode when I would use the old applications I had for awhile. Here is why I got this unit "Classic, or Classic Environment, was a hardware and software abstraction layer in Mac OS X that allowed applications compatible with Mac OS 9 to run on the Mac OS X operating system. The name "Classic" is also sometimes used by software vendors to refer to the application programming interface available to "classic" applications, to differentiate between programming for Mac OS X and the previous version of the Mac OS. Classic is supported on PowerPC-based Macs running versions of Mac OS X up to v10.4 Tiger, but is not supported on v10.5 Leopard and later, nor on Intel-based Macs running any version of Mac OS X." I did run the Apple hardware test and it came up with a RAM error so I took out the 2gig of ram and it still gave me that "are you sure you want to start "classic" mode with only 128M of RAM..." error