iMac taking additional clicks of the mouse to respond.
just having trouble getting my iMac to respond to one click of the mouse.
What year model is your iMac..?
Identify your iMac model - Apple Support
What mouse are you using..?
Find the serial number of your Magic Keyboard, Magic Mouse, or Magic Trackpad - Apple Support
Could be a faulty or failing Mouse..?
Test a different mouse. (most any PC, Generic, Logitech USB mouse will work with your iMac)