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Hey guys,
can someone tell me where or how I can get an OS9 system installer file to install on my iMacs (G4's) to run next to OSX.3.5 ?
Jaguar installed it automatically. Panther doesn't, unfortunately.
Thx in advance!

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Dani AI

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Three practical paths for to get Mac OS 9 working on a G4 iMac: (1) find the original Software Install / Restore discs that shipped with the machine, (2) buy a retail Mac OS 9 installer (used-vendor/auction), or (3) run classic apps in an emulator if native boot/restore media aren’t available. Check the exact iMac G4 model first — some early flat‑panel G4s could boot OS 9 natively, while many later G4s only support OS 9 inside the Classic environment. (everymac.com)

Original model restore discs are the safest because many Apple sets used machine‑specific OS 9 images; retail OS 9 discs (white label) are more universal but can still be too old for some late G4 revisions. Used marketplaces and vintage‑Mac sellers are the usual sources today; when buying, prefer a retail OS 9.1/9.2.1 disc or the exact restore set for your model. If a working OS 9 System Folder exists on any machine, copy it off before experimenting — that copy often provides Classic support without a full reinstall. (discussions.apple.com)

Practical install tips: create a separate HFS+ (Mac OS Extended) partition formatted non‑journaled (or use Disk Utility’s “Install Mac OS 9 drivers” option) so OS 9 can see the drive. To make a bootable OS 9 install, start up from the OS 9 CD (hold C) and use the Installer’s clean‑install option onto that partition; if only Classic is needed, a Finder drag‑copy of a compatible System Folder will usually work. Always back up the OS X side before repartitioning. (discussions.apple.com)

If native install or correct discs aren’t possible, emulation is a fallback. SheepShaver can run many Classic apps on modern hardware but has limitations (it does not support OS 9.1–9.2.2 because it lacks MMU emulation) and requires a ROM image legally obtained from a PowerPC Mac. Read emulator docs carefully before relying on that route. (en.wikipedia.org)

Quick checklist: confirm model, locate original restore or retail OS 9 media, format a non‑journaled HFS+ partition (or copy a System Folder for Classic), back up everything, and consider SheepShaver only if you cannot get suitable media. ’s point about preserving any existing System Folder first is a good starting step.

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Member Avatar for Dani

Unfortunately Apple decided that there is enough support out for OS X nowadays that OS9 is not needed. But that isn't necessarily so if you're one of those who runs a lot of old classic apps. If you have Jaguar installed with OS9, you can upgrade to Panther while keeping your OS9 intact.

Otherwise, if you did a fresh install of Panther, you should still be able to install OS9 off of your Jaguar cd.

commented: Awesome. I didn't know that OS 9 was still on the Jaguar CD! +3
Member Avatar for Chimney

Unfortunately Apple decided that there is enough support out for OS X nowadays that OS9 is not needed. But that isn't necessarily so if you're one of those who runs a lot of old classic apps. If you have Jaguar installed with OS9, you can upgrade to Panther while keeping your OS9 intact.

Otherwise, if you did a fresh install of Panther, you should still be able to install OS9 off of your Jaguar cd.

Thx, CSCgal. That's helpful.
Ciao,
Chimney

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