February 19, 2012, 7:25 AM —
When Apple released Lion (OS X 10.7), Mail received its biggest overhaul ever, gaining many new and noteworthy features. The changes to Mail in Mountain Lion are more subtle, though there are some nice improvements--along with one significant omission.
Mail has always let you find text within the body of an email message, but in the current version of Mail, you use a separate Find dialog that highlights only a single result at a time; to find subsequent instances of your search string, you repeatedly click the Next button (or press Command+G). Mail in Mountain Lion gains a Safari-like inline find feature: Press Command+F (or choose the Find command in the Edit menu) and type your search string--in a field just above the body of the current message, rather than in a separate window--and the body of the message is dimmed, with every occurrence of your search string displayed. You can use the arrow buttons next to the search field, or their keyboard-shortcut equivalents, to cycle through occurrences.