Developer website: Adobe Systems, Inc.
Beginning with Mac OS X v.10.2 (Jaguar), Apple has reserved the keyboard shortcut Command+~ (Tilde) to cycle through an application's open document windows. This change conflicts with the behavior of the shortcut in Adobe Photoshop 7.x (selecting the image composite in the Channels palette or selecting the master channel in the Levels and Curves dialog boxes). To restore the behavior of Command+~ in Photoshop 7.x running in Mac OS X v.10.2, place this plug-in in the Adobe Photoshop Only:Extensions folder within the Adobe Photoshop 7 Plug-Ins folder.
Mac OS X 10.2 or later, Adobe Photoshop 7.0 or later