Use an NSVisualEffectsView to make a vibrant (blurry) background.
By harlanhask... on August 25, 2014 03:56 (imported from Google Code)
The OS X Yosemite SDK includes a new class, UIVisualEffectsView, that enabl#
iTerm2 should allow for a 'Vibrant' background, either light or dark.
That'd be super cool.