Along with OS X 10.9.2 (see “10.9.2 Fixes Critical SSL Security Bug, Adds FaceTime Audio,” 25 February 2014), Apple has released Security Update 2014-001 with security fixes for those still using OS X 10.8 Mountain Lion, 10.7 Lion, and 10.7 Lion Server. Alas, it seems that people running 10.6 Snow Leopard are now out in the cold, since this is the first security update to drop Snow Leopard-specific fixes. Security Update 2014-001 doesn’t need to address the recently discovered SSL/TLS security vulnerability (see “Apple Updates iOS and Apple TV to Fix Critical SSL Security Bug,” 24 February 2014) because it doesn’t affect versions of Mac OS X prior to 10.9. But the fixes it provides are still significant, addressing vulnerabilities in app sandboxing, font handling, image display, Nvidia drivers, Quick Look, QuickTime, and the system clock, along with the Apache Web server and PHP scripting language. (All updates are free. For 10.8 Mountain Lion, 115.8 MB; for 10.7 Lion, 123.4 MB; for 10.7 Lion Server, 173.6 MB.)
Enter Dashboard, Expose, or Spaces Temporarily
Hold down F9, F10, F11, or F12 (or whatever you've set for the Expose and Spaces keyboard shortcuts) for a few seconds, and then release the key to enter and leave the appropriate mode without having to press the key again. This is particularly useful for Dashboard, in which you can check the contents of a widget and then return to your work with only a single key press.
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Not being able to upgrade with the Security Upgrade concerns me, but I don't want an OS that overwhelms my CPU.
Which OS is best suited for my machine?