I'm really curious what is going wrong with Bear.app on APFS.
The theming engine breaks on APFS (all the themes look like one particular theme) - but it works fine if you copy the app to a disk image formatted with any other filesystem, including Case-sensitive APFS (so it only breaks on case-insensitive APFS).
> The theming engine breaks on APFS (all the themes look like one particular theme)
I'm not sure if I'm running into the same problem as you, but I just opened up Bear on my Mac to check and applying the themes themselves works for me, however the preview of each theme is the same.
This is on macOS 10.13 Beta (17A306f) and Bear 1.0.4 (3733).
Does each theme look identical when applied for you?
Yeah, same issue. Pretty jarring for me, because I like the white theme.
Make an HFS dmg in disk utility and move the app over and it will work fine.
Surprisingly, it works fine on "APFS (Case Sensitive)" too (I had thought maybe it was a case-folding issue).
Edit: Oh, for me the theme works for the list of documents, just not the "edit" panel. The two halves are stored in separate files on disk for some reason. (https://i.imgur.com/ZGS3Fp9.png)
For me, the themes look the same in the preview pane. Interestingly enough, changing the theme changes every pane except for the editor pane (which is stuck with one theme). Restarting does not help.
The theming engine breaks on APFS (all the themes look like one particular theme) - but it works fine if you copy the app to a disk image formatted with any other filesystem, including Case-sensitive APFS (so it only breaks on case-insensitive APFS).
Nothing stood out to me in the dtruss output.