Question: spinning beach ball
I have an iMac, late 2012, running El Capitan 10.11.6. I've been having a LOT of trouble lately with a huge time lag every time I click on anything...the dreaded beach ball. I'm talking 3 or 4 or more minutes of lag every time I click anything. I was getting messages about my start up disk being full, so I just bought a WD Passport and moved a lot of files onto that to free up space. I now have 120 GB free on my hard drive (but it took me nearly 5 minutes for my "about this Mac" window to open to check that! I can literally click on my daily crossword puzzle page but end up printing it off my phone and finishing the puzzle by the time the screens load and it prints off my desktop! I've run disk first aid, but I don't know what else to try. Any suggestions or is this computer just getting old?