The most recent OS update for Mac called El Capitan (version 10.11) has been causing problems for applications including Office for Mac, Mac Calendar, Mac Mail, Java, and various device software incompatibilities. ITS strongly recommends that, for now, Mac users refrain from upgrading their operating system to El Capitan (version 10.11).
Microsoft has issued statements indicating there are several issues that they are working on resolving. Other vendors are working on catching up and updating their software to work correctly with this latest release.
ITS staff are continuing to monitor and test as updates to applications become available and prove to be more stable. If you have already upgraded to 10.11, you may not be experiencing issues and there is no need for action. Do let your Desktop Support Specialist know if any issues crop up.
Please consult your Desktop Support Specialist or Academic Computing Manager if you have questions about upgrading your Mac.