Can't connect wireless mouse to new Mac mini

Hi. None of the above.

After wasting a couple of hours trying to troubleshoot this problem using another computer, went to bed. This morning, managed to open the Bluetooth pane of System Preferences (with keyboard only!!!). The mouse was visible, with a "Connect" button; on which I could not press, not having a mouse...

A call to Apple Support was useless.

Finally solved the problem by using a Logitech mouse (with a dongle) with which I was able to press "Connect".

Thank you me for having a Windows laptop with a non-Apple mouse!!!