Panel "Dropdowns" appear on wrong monitor
If the Panels are on a second/external monitor on Mac OS, Illustrator renders the dropdown information (ie font size, stroke width, arrowhead type, rotation, Transparency type) not on the second monitor, but back on the Main monitor/iMac.
The example shown has the latest build, with panels on the right monitor and artboard on the iMac screen. Trying to select from the Stroke Width drop down menu puts the options on the iMac screen instead of within the Stroke Panel.
Photoshop doesn't do this, so it's not an Apple thing. Illustrator team, please fix this!
The right click on the Illustrator icon in the dock, assign to nothing worked for me!!
Try right click on Illustrator Icon in Mac Dock - Options - Assign to - Nothing.
James Bytheway commented
Im having this same issue. I found if my external apple monitor is set to my main screen the dropdowns display on my laptop. This needs fixing.