9. Back Up Everything
Earlier in this book I suggested that you have an external hard drive with a Time Machine backup. I stand by that advice, but I’m going to suggest another kind of backup as well. Before system upgrades, I recommend you also have a bootable backup. That’s a backup you can use to start your Mac up in the event that something goes wrong. Time Machine is great, but it doesn’t produce bootable backups. If you’re already running Lion, you can get by perfectly well with just your Time Machine backup, because one of the things that was introduced with Lion was the Lion Recovery Partition. This is an invisible portion of your hard drive that has a subset of OS X and some essential utilities, just enough for you to boot your Mac, ...
Get 10 Things To Do Before Upgrading to OS X 10.8 Mountain Lion now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
