Further news, I could get LR 5 to work, no problems, just no LR CC. Photoshop CC all versions work.
On the mac book pro, step by step, what are you doing?
What is the exact wording of the error message.
I am on the widows side. Boot camp 6. Windows 10 (ugh).
I downloaded creative cloud. I signed in. I clicked the box next to Lightroom cc.
I waited for it to download. When cliCa on the icon in CC or on the start menu, I get zero response. No error message.
I have signed out. And signed back in. Not help. I have downloaded LR 5, same method, it works. PS CC (all versions) work.
Sorry, I a little terse back there...
It started with a working LR CC, no problems, Happy guy. Then I did not use the laptop for LR and PS for a while. I was going on a trip and need my space, so I deleted a bunch of images that were duplicated on my desktop. I also deleted the LR cat file. I open LR (clicking on the creative Cloud) it said the it could not open my vacation.lrcat file. So I tried another catalog. I then tried to open the default. After several attempts, LR would not open at all.
I will try the new version that just cam out and will report it THAT solved it. (I hate to sound like a newbie, but I have been using LR since before LR. I forgot the name that had this program that Adobe bought and gave us free Lightroom. I have 30,000+ images on my desktop main catalog.)
Solved! Yeah team. When I install the latest version of LR, it now works.