On a Mac running OSX 10.10.1, the launcher crashes when the user selects the "Memory Game" located in the "Learn" section under "Example Game Projects."
On Mac Running OSX 10.10.1, Open launcher.
Navigate "to Learn" tab
Under "Example Game Projects," click "Memory Game."
Launcher Crashes.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-7769 in the post.