I get this message every time I start up my iMac "Please enter your iCloud password."
I keep a careful record of the many passwords I set up in various places and the list does not include one for iCloud, but it is just possible that I (or the person who set me up last year when I switched from a PC) set one up and I have forgotten the fact - and the password, of course.
For a long time I have just been clicking Cancel and have been able to carry on using the computer, but this is obviously not a very satisfactory state of affairs.
Can you suggest what I should do, please?
I've tried looking online for this exact question, but people only seem to ask about forgotten passwords but not about finding out for sure if they have one!