2021 user a later version of java an earlier versions of Moneydance.
A comment from Sean Moneydances software developer.
an update on the crashing issue:
• it happens on macOS (all versions as far as I can tell) primarily but not necessarily only when there is an external display connected. • the crash is at the java/vm level so we'll need the fix to come from there. A new build of the AdoptOpenJDK is due out any day now • this same crash is affecting other java apps with much more widespread use so people are working on it and I'm confident that a newer openjdk build (see above) will fix it.
I am hesitant to use preview versions of software so I’m inclined to wait until the next release - can you give me any idea when that may be? In the meantime, I’m avoiding moving Moneydance windows between monitors but I sometime do so by accident. So my question is:
Personally, unless you have online bank connections, I would upgrade to 2021 build 3034. It fixes many of these Big Sur issues, including crashes. Consider it a bug fixed version of the non-preview version. Don't do this tho' (yet) if you have working online bank download features......
The other. thing to do is to go to Mac / settings / general / prefer tabs and change to fullscreen or never.