I knew a few of these but what I was looking for was the C key on boot to boot from an external drive:
Syncing multiple Dropbox accounts from the same Mac
Perfect – this is exactly what I was looking for. I didn’t follow the instructions as far as adding the two scripts to my Logon items, but creating the two Automator scripts that I can run when needed was exactly what I was looking for.
Re-enabling screen zoom after installing Mountain Lion
Go to System Preferences, Accessibility, click on Zoom – ‘Use scroll gesture with modifier key’ option is deselected. Select it, and chose your key to enable the feature.
2007-2008 Macs will be oldest models supported by OS X Mountain Lion
For the next upcoming Mac OS X release, Mountain Lion, the oldest models supported (depending on type) will be those released around 2007-2008.
I have an Early 2008 MacBook Pro which I use as my daily machine, and it’s still going strong. I’ve maxed out the memory and replaced the HDD but other than that I don’t have any immediate plans to replace it. Looks like I just squeezed in under the wire though to get Mountain Lion support, so an upgrade maybe on the cards sometime in the next couple of years.