With the release of El Capitan (OS X 10.11) this week, some Microsoft Office 2016 for Mac users are reporting significant issues running the Mac version of Office on Apple's new OS.

On Microsoft's community forums, Office users are noting that Office 2016 apps crash and hang on El Capitan. While many of the reported problems center on the new version of Outlook, others note issues with Word or Excel running alongside another Office app. And some are reporting issues with Office 2011 for Mac on El Capitan.

It's hard to gauge how widespread the issues are. Over in the Apple community on Reddit, a handful of users are reporting issues, but most say Office and El Capitan are working fine together.

Microsoft is aware of the problem. "We know that some people may be experiencing issues with Office 2016 for Mac running on El Capitan," a Microsoft spokesperson told Download.com. "We're actively working on this with Apple. Until there is a fix, we recommend people install the latest updates to Office 2016 for Mac using Microsoft AutoUpdate."

On the Microsoft forums, a person claiming to be a company representative posted that the company does not have a timeline for a fix and asked users to stay tuned.

We'll update this story as we learn more.

Clifford Colby follows the Mac and Android markets for Download.com. He's been an editor at Peachpit Press and a handful of now-dead computer magazines, including MacWeek, MacUser, and Corporate Computing.