![]() Mac OS X 10.5, which was part of the Intel transition, dropped support for classic applications entirely. Mac OS X 10.4.11 was the last version to support the Classic environment, which was an optional installation item with Mac OS 9.2.2. When the first retail version of Mac OS X 10.0 was released in March 2001, the minimum version of classic Mac OS to be supported was 9.1, which was included as part of the installation. Another transition technology called Carbon was also introduced, which allowed applications which took advantage of the API to run on both Mac OS 9 and PowerPC versions of Mac OS X. Stability was inconsistent and improved with successive public beta releases. Any problematic legacy program that would normally cause Mac OS 9 to crash could be contained and only require relaunching of the Classic environment without bringing down the main system.ĭuring beta testing of Mac OS X, the minimum version of classic Mac OS to be supported was 9.0.4, which needed to be installed separately. During its early development under the code name Rhapsody, a proof-of-concept called " Blue box" demonstrated that backwards compatibility could be provided through a native application that would run the older software in a sandbox environment. Judicious shopping on places like eBay can produce a good deal on an older Mac.įor higher prices, but with better warranties and often recourse, some on-line sites offer used Macs.Mac OS X is based on NeXTSTEP, which uses a Unix-based kernel that is inherently incompatible with classic Mac applications. This Apple KBase article clarifies some of those -Īrticle #86209 - Some Computers Only Start Up in Mac OS X ![]() This Apple KBase article shows which machines and models are supported by Apple for OS 9 booting -Īrticle #25114 - Mac OS 8, 9: Compatibility With Macs These include those G4 MDD (Mirrored Drive Door) models whose processor speeds are 1.25GHz or slower, and which do not have a Firewire 800 port or any earlier G4 model.Īn iMac that is an original G4 model, or any G3 model.Īny iBook G3 model (none of the iBook G4 models are OS 9 bootable).Ī PowerBook G4 which is no newer than an '02 model.Īn eMac which did not come with a SuperDrive nor USB 2.0. If you need a machine which can boot to OS 9, you will need to get one of the following -Īn OS 9-bootable G4 tower. ![]() ![]() No G5 Mac can boot to OS 9, although they can use it as Classic. The Intel-processor Macs are not supported by Apple for OS 9 at all, either for booting or as Classic. ![]()
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