I have moved a jPeg photo I want to sharpen on to my desktop and thence to the black screen of Lightroom. However, I see no edit tools on any part of that black screen. What do I do now? The "support" section of Lightroom is unresponsive.
Are you trying to move images from lightroom to your computer's desktop or are you referring to the mode in Lightroom Classic (The Develop sectios) where you can make adjstments in Lightroom?
Also, EXACTLY what version of Lightroom are you using (Classic, Desktop, Web) and what version?
And while I'm at it, what is your OS and what release?
Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut as that is just so much dead space to us non-Techs.
OK, first off I'm surprised that LR 4 is working at all in Catalina. But if it is, it is.
Your workflow is not correct. Please see this for more information on bringing your iPhotos photos into LR.
Also, when you go to the site you can see an offer to download a free PDF on how to use LR if you subscribe: you really should do this, the Lightroom Queen has LOTS of great information.
I suspect the OP has Lightroom Cloudy , the new v4
I moved your post to a better forum. From LrC to LrD.