Lightroom CC consistently throws up "module" problem (reported widely elsewhere) on Yosemite (imac retina 5k). I have no problem with a standalone LR same release (5.7.1) on my MacBook with Retina. Have tried all permutations -combinations including multiple uninstall and reinstalls. When is a solution expected ? As of now looks like Bridge and Photoshop CC versions work OK.
Yosemite sometimes has problems, often related to "default" permissions needing to be changed
-one person's solution https://forums.adobe.com/thread/1689788