Lightroom window moves to secondary monitor

[Kristian Walker]

Running LR 12.4 on an iMac (Monterrey 12.6.3) with a second monitor. I have LR on the main iMac screen in Full Screen with Menu Mode and other apps on the 2nd display. Almost every time I click on an app in the 2nd monitor, the LR window switches to that display and I need to change the screen mode to Normal, move it back to the primary screen the go back to Full Sxreen with Menu. This has been happening for a while with several different versions of both OS and LR.

It's driving me nut and any fixes would be greatly appreciated?

[Daniel R Bynum]

Hi there,

I would go under preferences, go to display and check the settings there. See my screenshot.

[JohanElzenga]

I don't think this has anything to do with the preference setting as suggested, because that preference is about the secondary Lightroom window, not the main Lightroom window that you have a problem with. I think you need to check the 'Spaces' settings in MacOS X Settings. https://support.apple.com/en-gb/guide/mac-help/mh14112/mac 

I remember having issues like this when I had Spaces setup wrongly. I don't use Spaces at all anymore, and haven't had any issues since.

[evanwish]

I'm having this problem as well and have tried everything I've been able to find online. No luck so far. 

Lightroom will randomly jump to one of my other monitors. I have spaces set up on my mac, and lightroom doesn't jump between spaces on the main monitor, just will dissapear to another monitor. Often when I've done "open in Photoshop," but not always. This wouldn't be too much of a problem, but because my monitors have different resolutions, when I drag lightroom back to the main monitor, lightroom is shrunken and the only way to make it full screen is to quit lightroom and restart. This wastes lots of time as it keeps happening, and is very frustrating.

And no, it has nothing to do with the lightroom's second monitor setting. 

[anssik_]

What's the solution to this? I've had this issue since I accidently updated macOS from 13 Ventura to 15 Seqouia (macOS 15.3.1). Running Lightroom Classic 13.5.1.