PL9 (9.6 and earlier) stores edits in history when running on a Macbook but not on a Mac Mini

Is there a fix for this?

I’m on an M4 mini/Sequoia/9.5 just checked an old edit and the Advanced History is there.

This seems more likely to be some kind of configuration difference or perhaps a glitch that could be cured with a re-install.

The only thing I see in the settings is a selection for how many history states are retained. Its lowest value is 10, but perhaps a change to this value (it’s in the Advanced tab) might ‘kick’ it into action.

I assume you can see the History palette on the mini but it has no content? Also, have you checked it is not just collapsed? All palettes can be fully collapsed and if you’re not used to this it can be hard to notice. If there is nothing at all below the word HISTORY then it is collapsed and clicking on that word will expand it.

Perhaps you have considered all of this, but it never hurts to throw out ideas, right?