Online guides say to type "deactivate" into help window on my Mac but the prompt options they say will come up, don't come up. What now?
Which version of Lightroom are you trying to Deactivate ?
If you cannot see Deactivate under Help menu ,Select Sign out.
Please refer Learn to activate or deactivate Adobe applications and follow the instructions
I'm running LR 6. I think the Sign Out recommendation worked. Thank you very much. I don't know why ADOBE doesn't mention the Sign Out option.