Apple released the twelfth major OS X called El Capitan on Sept. 30. Many Mac users who have upgraded are complaining that the software update causes Microsoft Office 2016 crashes.

Mac users have noticed that following the El Capitan update, the Office 2016 stopped working if there is more than one app open.

"I finalized the El Capitan upgrade this morning and since then I can't use my mac with office 2016 any longer ... Multiple random crashes from any of the Office 2016 apps" shared a user on Microsoft Community.

Mac owners using other versions of Office are also facing issues with El Capitan.

"I [am] having the same problem with Office 2010 for MAC. Won't sync and requires I use Force quit. Basically have shut down Office until a fix is provided. NOT GOOD!!!" said another Mac user.

Some Mac users complained that the issue mainly surrounds Outlook while others have reported that even Excel and Word have problems after installing El Capitan.

The issue does not appear to be something new as it has been ongoing since early July when the first public beta of OS X 10.11 El Capitan was released. Some observers pointed out that the issues were also present in previous OS X releases.

Apple has not yet addressed the issue, but assures user that it is working with Microsoft to resolve the problem at the earliest time possible. However, a timescale for the fix has not been announced.

The latest issues with El Capitan has made some users are skeptical about upgrading to the new OS X.

"I've heard there might be issues with office 2016 on El Capitan. I'm on Yosemite now, so should I hold off on updating?" posted a user on Reddit.

Mac users hope that Apple and Microsoft will effectively resolve the problem and issue a solution as soon as possible.