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| Author | Downgrading (Read 7822 times) | ||||||
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Old Mac Geezer
64 MB  Posts: 112 
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on: August 13, 2007, 12:41
Has anyone ever managed to downgrade a Mac into running an OS version earlier than what it came with? I know you can often upgrade a Mac beyond it's official support from Apple, but never heard of anyone violating the "no older OS version than it shipped with" edict before. If some machines can be tricked into newer versions than are officially supported, it must be possible to go the other way, as well. |
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wove
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1024 MB Posts: 1363
Reply #1 on: August 14, 2007, 00:01
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As a general rule you can not down grade. Some machines shipped while several OSes were current. The PM6500 initially shipped with 7.6 but the last units out the door shipped with OS 8. In that case you would be able to run 7.6 on all PM6500s which would be an OS downgrade for the last units Apple shipped. There is anecdotal evidence that some machine will run older OSes. The Kanga (PowerBook 3500) is essentially identical in architecture to the earlier 3400s, there have not solid reports in this forum anyway saying this is indeed true. Changes in architecture will invariably lead to the need for a newer OS. bill
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