On several different occasions, I've had to abandon activities using the wiki when working with groups of Mac users in a workshop setting due to pages not saving properly.

Specifically,the wiki is set to Type: student and Groups: Visible groups. As users save their wiki page, the process stalls and the browser has to be closed and restarted to return to work in Moodle. In most cases, the data was actually saved in the wiki; the process just isn't able to complete the reload of the page.

The users are using Firefox.

I complete this same activity with groups of Windows users often without issue.

I've found this issue referenced in several forum posts over the last few years in the community forums without suggestions for resolution.