The frustrating part was that the requirement was only checked by the installer, so you could put the drive in a supported machine[0] to install, then swap it b

The frustrating part was that the requirement was only checked by the installer, so you could put the drive in a supported machine[0] to install, then swap it back and it would run fine. I think there was a similar thing with a processor speed check on Leopard[1]. There were also third-party workarounds if you didn't have access to a supported Mac. I had a friend who always had the latest and greatest, so I borrowed his machines to upgrade my last-year's-models. 0: https://hints.macworld.com/article.php?story=20051211074138859 https://hints.macworld.com/article.php?story=200512110741388... 1: https://lowendmac.com/2007/unsupported-os-x-10-5-leopard-installation/ https://lowendmac.com/2007/unsupported-os-x-10-5-leopard-ins...