Forgive my Mac ignorance here but I'm an old Windows PC guy who just bought a used G4 desktop that's suppose to have both OS9 and the latest OS X OSs installed. It arrived yesterday and when it boots up, all I'm seeing is a screen saying it's running OS 9. All the files seen in the Hdd say OS 9. I'm not seeing anything mentioning OS X (Jaguar) but shouldn't I if it WAS installed as the seller said he did? (no discs included either btw). I'm use to seeing dual boot OSs in Windows based PCs where upon boot up, you'll get a DOS screen with choices for which OS you wish to choose before it goes into the latest default OS automatically. Either Macs aren't anything like that (never used one before) or OS X wasn't installed afterall. Any info, opinions on this?