Macintosh SE/30 M5119, manufactured July 1991. I powered on this unit prior to removing the hard drive, and it began to load but wasn’t able to do so fully. At first a message popped up that read “Welcome to Macintosh,” but then a new message quickly popped up. This one read “Sorry a system error occurred. ‘Speed Copy’ Segment Loader error. To temporarily turn off extensions, restart and hold down the shift key.” No idea what any of that meant. Also I should note I started this unit only with a mouse, I didn’t have a keyboard that fit the port in the rear. That could have been an issue. Selling as is, for parts or repair, without a hard drive. No power cable or mouse or keyboard included. Just the computer as I found it minus the hard drive.