In Fall 2023, Slack introduced an updated client with some unpopular UI changes. The tweaks in this document can be used to revert to the old client or hide the new side bar. These will reset every time you fully close Slack but they are easy to re-apply once you get the hang of it.
The fist step is to enable dev mode, which can be accomplished by setting a system-wide environment variable.
- Close the Slack app (
command+Q) - Open the terminal and run these two commands separately: