O'Reilly logo

Take Control of Upgrading to Mountain Lion by Joe Kissell

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Make Sure Your Disk Is Ready

Two features in Mountain Lion—FileVault 2 and Recovery mode—have special requirements when it comes to the state of your disk at the time you upgrade. In certain situations, especially if you’re upgrading from Snow Leopard or earlier, you may need to make changes to your disk before you can upgrade.

As I explain in a moment, you can postpone changes like disabling encryption until just before you’re ready to run the Mountain Lion installer; I mention this in case you’re reading ahead but planning to perform the upgrade later. But bear in mind that making these changes to your disk may be time-consuming, so take that into account when scheduling time to install Mountain Lion.

Consider Disabling Encryption

If you currently ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required