However, as it turns out, Mac users have several ways of dealing with this issue. You can close out the app from the Dock, ...

The computer is trying to function, but nothing is happening, so the iMac or MacBook spinning wheel just keeps on spinning. Here's what to do about it. How to Fix a Spinning Wheel of Death on a Mac ...

If your iPhone isn't booting and shows a spinning wheel, there are a few things you can do to get it working again. Here's how to fix black screen on iPhone.