
You can clone an existing drive to a larger drive. Once the Mini was set up and being a surprisingly good PLEX server, we realised we'd need a larger hard drive. Upgrading the Mid-2006 Mac Mini's Hard Drive

Repeat until running current 64-bit Ubuntu Linux. This version will then ask the same question. Once installed, it will note there is a new LTS, and ask if you want to upgrade. In theory, you should be able to do this from a USB stick, but in reality, you cannot.
2007 MAC MINI HARD DRIVE REPLACEMENT INSTALL
Ubuntu 14.04.6 is the LAST version of Ubuntu to have an "amd64-mac" build, which specifically supported install to 64-bit Apple systems with 32-bit EFIs. For some reason Thanks to issues in Intel's Northbridge design, only 3G will be usable - the rest is mapped to various I/O functions and video display, whether you want it to be or not. This results in a Mac Mini Mid-2007 with 32-bit EFI and 64-bit processor. Then upgrade to 4GB RAM and install new HD. Do this even if your 2006 came with a 64-bit processor (a very few did), because this upgrade makes the 2006 Mini capable of booting with more than 2GB of RAM.

It makes the Mac Mini think it's a Mid-2007, not 2006. This runs under OS X, which is why you need that install. Then and only then boot to OS X and use the firmware upgrade hack floating around online in retro/old hardware circles. (2.19 is available also but costs a lot more.) Install a socket-compatible 64-bit processor, like the Core 2 Duo 2Ghz. You won't need to keep it, but you'll need it at first. Upgrading the Mid-2006 Mac Mini to install and run 64-bit Linuxįirst and foremost: HAVE OS X STILL INSTALLED. But its 32-bit processor and 512M of RAM was obviously not going ot be enough. "Something" turned out to be a PLEX media server. He'd asked if I wanted it, and I said "sure, I can upgrade that, probably get Linux on it, maybe use it for something." Honestly this is as much for my own memory as anything else, but if you're interested: a couple of months ago, housemate Paul brought his mom's old 2006 Mac Mini back with him from a visit.
