There may be some instances where opening a rogue Microsoft Word document on your Mac might result in a progressive hang of OS X applications and services, to the point where the system is no longer responsive to any input.
When this happens, the document will open without problems in PC versions of Word, but when you open it or preview it on the Mac, then at first you will see Word or Quick Look hang, followed by OS X losing network connectivity, and then each other application and system service subsequently hangs. At this point, you will see the spinning color wheel cursor appear and never go away, and while the system’s force-quit menu can be invoked by pressing Option-Command-Esc, no programs will respond to a force quit.
If this happens to you, then the problem at hand is likely an issue with the management of the fonts Microsoft includes with its Office suite. Therefore, try some of the following options to help fix this issue:
- Remove and rebuild the Fonts cache
The easiest way to do this is to restart your system into Safe Mode and then reboot it normally; however, you can also do this in the Terminal with the following command:
sudo atsutil databases -remove
- Disable specific Microsoft fonts
It is possible one specific font in Microsoft’s suite is causing the problem, so first try troubleshooting fonts to see if you can identify any duplicate fonts, damaged fonts, or other problems with your font library (especially any fonts in the Macintosh HD > Library > Fonts > Microsoft folder, that might related to this problem).
This is perhaps the more challenging approach, since sometimes you might have to try disabling or removing various fonts before you identify the proper one. First check and troubleshoot each font in the Microsoft fonts folder, which can be done easiest by removing them all and then adding them back one-by-one and then restarting and re-trying Word to see which causes the issue.
- Clear the Quick Look cache
It is possible the Quick Look cache may be damaged, resulting in the problem. If your Mac only shows problems when you invoke Quick Look, then try running these two commands in the OS X Terminal, to reset and clear the Quick Look cache:
qlmanage -r qlmanage -r cache