Many Outlook users have complained that Outlook doesn’t work well on a Mac device. And there are times when it doesn’t open and may randomly crash or freeze. Some people say that they cannot even launch the software. And all these issues like why won’t outlook open occur because of several factors. Some of the reasons are problematic add-ins and damaged files, corrupted profile or navigation pane issues. However, this issue can be easily solved if you follow the steps given in the manual on the official website.