The following workaround will work with Safari or Firefox:
You may be unable to import messages from Lion Mail.You may be prompted to save your presentations when switching windows.Note: As new major versions of macOS are made generally available, Microsoft will remove support for the oldest version and support the newest and previous two versions of macOS.
Switching out of or quitting Slide Show in full-screen mode may result in inconsistent window behavior. To provide you with the best experience, Microsoft 365 for Mac, Office 2021 for Mac, and Office 2019 for Mac supports the three most recent versions of Apples macOS.Note Microsoft has been working with Apple from the early days of MacOS 10.7 (Lion). Summary This article discusses known issues that may occur with Office for Mac applications on MacOS 10.7 (Lion). For more information about this change, read this blog post. Pressing the Command and Tab keys to open another application while in Presenter View may crash PowerPoint. Office 365 ProPlus is being renamed to Microsoft 365 Apps for enterprise.The date format may display the year as 2 digits insead of 4 digits.The date format may display the year as 2 digits instead of 4 digits.Excel 2008: MSQuery will not work on any version of Excel 2008 on Lion.However, it will not work on other language versions of Excel 2011 on Lion. Excel 2011: MSQuery for English will work on Lion.Excel may crash when you move a sheet from one workbook to another workbook.These issues will likely only be encountered in specific situations or configurations: Here is a list of other known issues that Microsoft is currently investigating. Because Lion no longer supports Rosetta, applications that relied on it will no longer function under the new MacOS. Previous MacOS versions supported Rosetta, an Apple Mac OSX bridge technology that enabled applications such as Office for Mac 2004 to run on the latest chip architecture for Mac.