I just did an HD swap.
Previously, you would just insert a CD and boot from the DVD drive by holding command C or something. It would load a small version of Mac OS X that had the utilities to do a clean install or format a drive.
Of course, Mountain Lion doesn't come on disc at all. The alternative for reinstalling is to hold command R to boot from a recovery partition.
Of course (2), if you're installing a new drive it won't even have that on it. If you have a newer mac it can connect to Internet to download and install ML on a new drive.
If you have an older one without Internet recovery, you have to create a bootable USB drive that will copy the recovery partition to a USB. Apple have a released a tool to do this. It's actually called the lion recovery disk assistant or something.
There are also ways to rip the installer from the downloaded ML package if you don't mind doing some very minor hacking about. I prefer to stick with official methods as much as possible so I created one using the official tool.
Awesome!
Went ahead and did everything today. So far so good!
SSD speed is truly wonderful. I'm very happy.
Questions though:
1. I threw in 8GB of RAM, As two 4GB sticks; OS X is still only detecting 4GB of RAM though. What's the likely culprit? Mobo firmware?
2. Best suggestions for scripts like User Highlighting for NeoGAF in Safari? Had it working just fine before on Mountain Lion; forgot what I used.
3. My finger swiping settings in Trackpad Options aren't working all the time. Most crucially, I need three finger swipes left/right to let me go back/forward in folders and on web pages. I used to use Better Touch Tool...but neither it, nor the standard Trackpad Options let me set it and have that setting *stick*. What gives?