Below, you can find a list of all known issues related to just:in mac 2026.0:

Just Control

After rearranging the devices within the device and channel list on the left side of the config panel, the actual contents of device settings will be displayed incorrectly. Once selecting another device, everything will be ok again.
The Calendar selection area is disabled when switching from a Channel in Schedule mode to a Channel in Crash mode. When switching the Crash mode Channel into Schedule mode, the Calendar selection area is disabled. When switching to the Schedule mode Channel again and then back to the other Channel everything is fine again. Alternatively, you can switch back to Crash mode and then to Schedule mode again.
The "/" symbol is an invalid character for filenames and will cause a write error when starting a Recording. Please ensure that filenames do not contain this symbol.

Just In Engine

When planning recording sessions, please verify that they do not exceed midnight, due to a time mismatch.
There might be an issue with importing FCPXML into Adobe Premiere Pro regarding stereo track alignment.
The Proxy XML path might not work correctly.