Why do I get a round colored wheel
Why do I get a round color wheel- like the computer is thinking
MacBook Pro, iOS 8.2
That's just about right, it is having trouble doing something.
Open Activity Monitor, Show:>All Processes, sort on CPU%, see if anything using too much CPU% when this happens, click on Memory tab, do you have many Pageouts?
How much free RAM & free Disk space do you have also, click on the Memory & Disk Usage Tabs.
Open Console in Applications>Utilities & see if there are any clues or repeating messages when this happens.
Click on the top line we want, Shift plus click on the bottom line we want, CMD+c to copy, then paste the text in a reply with CMD+v
A few dozen lines should be about right, hundreds or thousands won't likely be readable.