If you use Adobe Photoshop Lightroom 5 on OS X Yosemite (10.10 through 10.10.1), you might have noticed that the Map module may load slowly or fail to load at all. According to an Adobe statement at Photoshop.com (Lightroom: Issue with Map module in OS X 10.10 (Yosemite)), the problem was in OS X network code Adobe was using to get map data from Google Maps; Apple has confirmed to Adobe that this bug is fixed in OS X 10.10.2 which is now available.

After you install the OS X 10.10.2 update, the Lightroom Maps module should work properly. You can update using the Mac App Store (click Updates) or download an installer from Apple (OS X Yosemite 10.10.2 Update tech note; or use this direct download link: (OS X Yosemite 10.10.2 Installer).