Why does my Mac's cursor often turn into rotating color pinwheel that freezes up my screen until I restart the computer?
The “rotating color pinwheel†goes by many names, both official and colloquial (Spinning Wait Cursor, Spinning Disc Pointer, Beach Ball of Doom, Rolling Rainbow of Death and so on). It usually appears temporarily when the Mac is busy with a task, like saving a large file. In most cases, the wait cursor should disappear after a few seconds. If it sticks around until you have to restart the Mac, it sounds like time to do some troubleshooting.
If you regularly get the wait cursor when working on the Mac, it could be because of a number of things, including lack of memory (the RAM kind) to efficiently complete the task on screen, not enough available hard-drive space or an overworked processor. If the cursor appears only when using a certain program, the issue may be with that piece of s oftware. If this turns out to be the case, check the program's online forums to see if this is a known issue, hopefully one with a workaround or solution.
Instead of restarting the entire computer, you may want forcibly close the program you have open when the wait cursor appears, to see if the problem is just with that one particular application. To force-quit an unresponsive program, press the Mac's Option, Command and Escape keys at the same time. In the box that appears, select the stalled program in the list and click the Force Quit button.
If more than one program keeps stalling out and the Mac is underpowered, adding more memory to the computer and deleting unneeded files from an overstuffed hard drive might help, as can downloading system and program updates. But before you dive into hardware upgrades, check out The X Lab's frequently asked questions page for a collection of suggested solutions to various problems regarding the Spinning Beach Ball of Deat h.
