So I have a "Mid-2010 iMac 21.5", I upgraded the harddrive approx 3 months ago to a solid state drive and it has been amazing! So fast, very stable (on El Capitan) and I loved it. I recently noticed there was an update to Sierra, to be honest I thought El Capitan was pretty new but I thought I might as well get the latest greatest. Ever since upgrading to Sierra about a week ago I have had the computer totally freeze up on me, well everything except the mouse. I can move the cursor around but I cannot click on anything. Keyboard shortcuts do nothing etc... The mouse arrow was actually the little finger pointer once because if froze while hovering a link, it stayed that icon everywhere I moved it. The only solution I could find was to hard reset the computer, then it did it again to today. Is this a known issue? Is there a fix? What logs could I provide to help resolve this? P.S. I use the stock Apple keyboard and mouse.