
Trouble installing Mac OS X Tiger on a MBP 3,1 (2007 MacBook Pro)
EDIT: Solved. Here's what I did:
Download both Part 1 and Part 2 of the MacBook Pro 2007 Mac OS X Install DVD from Archive.org:
Part 1: https://archive.org/details/MacBook_Pro_Mac_OS_X_Install_Disc_1_2Z691-6088-A_Apple_Inc._2007 (download the .ISO)
Part 2: https://archive.org/details/691-6113-A2ZMac_OS_X_Install_Disc_2._Disc_v1.0_2007_DVD (download the .toast file and then change .toast to .iso in Finder; it's the same thing).
Get 2 USB flash drives. Use balenaEtcher to flash Part 1 onto one USB and Part 2 onto the other USB. Plug in the first USB, reboot, hold Option key, boot from it and install. Once it's done installing Part 1, it'll reboot and will then prompt you to insert the CD for Part 2. At that point, plug in the Part 2 USB drive. KEEP THE PART 1 USB PLUGGED IN. It will automatically detect the Part 2 USB and will continue automatically.
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I've been trying to install Mac OS X Tiger on my 17" 2007 MacBook Pro (MBP3,1). So far no dice. I tried versions of 10.4 until research revealed that I'd need 10.4.6 or higher (and likely 10.4.7 or 10.4.10 as those appear to be the only full install versions available online).
However, even when I've successfully converted a 10.4.10 DMG to ISO and made it a bootable USB drive (which the Mac recognizes and tries to boot from), I get the prohibited symbol and can't actually boot from the installer. (I used this to get this far: https://archive.org/details/MacOSX10.4.10-iMac-2Z691-6104-A_2Z691-6113-A )
Any tips/suggestions? I do have blank DVD-Rs I can use if need be but I don't have many so I'd prefer to figure out the solution before I start wasting DVDs. If the 10.4.10 ISO above doesn't boot from a USB I'm not sure why it'd boot from a DVD.