オリジナル投稿者： rj713 ,
Your unit came with Panther (10.3). You can get a copy of the original Grey disk from Apple for about $15. If you want Tiger you need to buy a Retail copy (Black) to do the install. Apple has not had a downloadable OS since OS-9. You could probably find a illegal copy online but most people find problems with such downloads including trojans and other malware.