And not just inconvenient like 15.2 was. My initial testing seems to indicate that previously working versions of XMALab are not even launching on MacOS 26 due to a segmentation fault, seemingly due to changes in how MacOS is handling OpenGL (upon which XMALab relies).
I'm looking into it, but if you've already upgraded and XMALab works for you, please let me know (and which version of XMALab), because that means it's just my setup.
If you haven't upgraded MacOS yet, I suggest you don't. If you _do_ or _have_ upgraded, and XMALab doesn't work for you, you can probably use a virtual machine either running Windows or an older MacOS version. UTM is an excellent free virtual machine for MacOS.
Will keep you updated, but progress will be slow because I only have limited access to a Mac (and limited time to devote to this).
On the upside, a new version is compiled for Windows that is _significantly_ faster in marker tracking, especially when using video/cine rather than jpg/tif stacks. (I'd been hoping to get that working for MacOS this evening, which is how I found it doesn't work on Tahoe)
Peter.