If you have a mid-2010 iMac, Apple has just released the iMac Hard Drive Firmware Update 1.0 to resolve a problem that might prevent your iMac from booting properly. Although there’s no way to know if you really need this update or not, the inability to boot could make installing this update in the future significantly more difficult, so I’d recommend doing it now, after making sure you have a current backup. (Free, 767 KB)
Hide TextExpander in the Dock
If you don't want to see TextExpander's icon in the Dock and the application switcher, you can remove it. Just open TextExpander > Preferences > Appearance, and select Hide TextExpander Icon in Dock. You'll still be able to access TextExpander from its menubar icon.
iMac Hard Drive Firmware Update 1.0
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