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I need Tiger to run my design software and Leopard came on my new Mac Pro. How do I get both on my machine to boot from one or the other? Or is it possible to run both side by side as with Widows.
I read the thread for Panther and Tiger and wondered if Tiger and Leopard would be different.
Thanks for your help!
LandArch

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Dani AI

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Short answer: yes — you can have Tiger and Leopard on the same Intel Mac Pro. Two practical approaches work best: dual‑boot (each OS on its own internal volume or drive) or run one OS inside a virtual machine so you don’t have to reboot. This addresses ’s need to run legacy design software while keeping Leopard as the primary system.

For dual‑boot, the safest route is a second internal drive (or a separate partition if you must). Back up first, create the extra volume with Disk Utility, then install Tiger onto that volume. Important compatibility note: Intel builds of Tiger only began with 10.4.4 and many retail Tiger DVDs are PowerPC‑only; Intel copies were typically the model‑specific “restore” discs that shipped with Intel Macs. If your Tiger media is PowerPC‑only it won’t boot an Intel Mac Pro. (en.wikipedia.org)

Virtualization (what mentioned) is a convenient alternative if you want both running at once. Historically Apple’s licensing and the platform’s EFI meant only Leopard Server was officially virtualizable early on, and vendors (VMware/Parallels) focused on server guests first — but products evolved to support more scenarios. Check the VM product’s documentation and Apple’s licensing for the exact guest OS rules before you buy. (blogs.vmware.com)

Quick practical tips: try your app on Leopard first (it may already run or use Rosetta for PowerPC binaries), install Tiger to a separate physical disk if possible, hold Option at boot to pick the OS (or set the default in Startup Disk preferences), and keep a full clone backup before any partition or OS install. Rosetta let Intel Macs run PowerPC apps back then, but it was removed in Lion — factor that into long‑term plans. (support.apple.com)

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Member Avatar for OlyComputers

It seems like the same process would work, If it doesn't you could try virtualization software (I've never used virtualization with a mac client, but I'm sure it exists) to tun tiger for your design work.

I'm surprised that any Tiger software wouldn't work on Leopard, have you actually tried installing it?

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