Okay, so I've just replaced the HDD in my old 2011 Macbook with a brand new SSHD (which is a bizarre contradiction in terms, but it wasn't I who coined this shitty term, so...*shrug*) - which annoyingly involved having to bring out a miniscule torx screwdriver, but luckily I had a bit that fit. Justice prevails!
...Then there's the matter of re-installing OSX, which just goes to show that Apple really isn't very good with software overall. They have this thing called internet restore, or whatever, where you download the OS over the webs, but fuck me did it work? Nope. It just wouldn't kick in - maybe because my new drive wasn't Apple formatted, but how the hell could it possibly be, seeing as it was brand new. Luckily I had prepared a USB stick just for this eventuality. For some reason the stick had not wanted to boot when I'd done a dry run using my old system drive, but now it worked. Weird. And again justice prevails!
So after like...minutes, the installation program has finished booting from the stick. I get a set of choices, one being Install OSX, and another which is Start Disk Utility. I fucking KNOW that Apple being shitty Apple will assume there's a disk formatted and ready if I select Install OSX, but maybe it won't assume, and will (like Microsoft, who knows how to write OS installers) offer to format/partition a drive as a step of the install procedure. So then starting Disk Utility would be a waste. So I pick Install OSX, and hope for the best.
...Of course, it assumes I have a drive prepared and ready, so I fumble around in the menus, trying to get back to the main menu (I should have simply selected Quit Install OSX), and managed to end up in a state where the only way out was to restart the computer and boot it back up again. WOWIE Apple! Awesome stuffs!
So, several minutes later booting up one more time from the USB stick, I'm back at the main menu again. Now I pick Disk Utility, set up the drive, quit Disk Utility, and start OSX installation. Now it's happily chugging away, reading the OS from the USB stick presumably. Will be interesting to see how fast this old Mac boots once I've restarted it a couple times; windows boot times from this drive - once properly run-in - is reported as just a few seconds slower than a good SSD.