I'd really appreciate some help with this !
I can't use Adobe Mobile or Adobe Stock because they both think I'm not signed in to Creative Cloud.
Trying to use "Get started with Adobe Mobile" at top left shows the "Connecting..." window, described above, which flickers in and out of existence but never gets anywhere and never goes away (thus preventing me from using Lightroom, and often preventing me from being able to quit it).
Adobe Stock just won't upload anything, saying "Upload failed. For the Adobe Stock plug-in to be active, you must be signed in to Creative Cloud".
But I am signed in to Creative Cloud: the CC app in my menubar shows me as logged in, and Lightroom's Help menu has a selection showing that I'm logged in and inviting me to log out if I want. Besides, the apps wouldn't work if I wasn't.
Could you try the steps from this thread...Re: Can't log into Lightroom mobile on Mac.
In addition please double check if the issue still occurs to your with the new Lr Desktop version which we released yesterday.
Hope this helps.
I updated Lightroom to the new version (CC 2015.12) just now, but the problems remain exactly as I described them above.
The thread you mention was describing a problem where the person couldn't update.
So what do I do now ?
I uninstalled Lightroom with the CC app and reinstalled it, but the problems remain just the same.
Can I have some help here please?
The problems (connecting to Adobe Mobile and Adobe Stock) went away after I did something with the Mac Keychain Access app. I wish I knew exactly what I did, but I don't. Adobe support told me that the problem was therefore likely due to "authorization" and that in such a case one should "give permission to all Adobe folders in User library & hidden library". I'm not entirely sure how that is done, but at least the connections are now working, and I have some sort of handle on how to fix them should they arise again. Hope this might be of some help to others who may be experiencing this issue.