Clone Tool Not Working

[Lydia]

(04-13-2020, 01:51 AM)Paul E. Lehmann Wrote: Running Gimp 2.10.14 on Mac OS Catalina Version 10.15.4

Clone tool does not work. 

It seems as if I can select what to clone but when trying to paint or substitute, nothing appears.  I have tried every option under the clone tool list of options and have tried suggestions others have posted.
  
I can do "Clone" with Affinity Photo but not Gimp.

It seems to be a common problem.

Any suggestions other than just use Affinity and forget Gimp.

I was having the same problem. I kept getting the plus symbol when I did Cntrl, Click, and then released Cntrl.  So it looked like I was able to select a source, but nothing would happen when I tried to clone.  I realized I had my paintbrush set to "pixel" so the clone edit was so small that I couldn't see it. I enlarged and it is working great.  You will know if it is enlarged if you see a circle where you selected your source.  Not sure if you tried looking at tutorial videos online, but it helped me.