Hello, I do not have a Mac to test all myself, but this certainly works everywhere, or other users would have complained before.
- When you search, a new panel opens with the list of matching bookmark items.
- Then click on the one you want to show and the main panel will scroll down to show the corresponding item in the real list, with its sibblings around and ancestors above.
- If the list of sibblings is big and you do not see the parent folder, simply right click on the bookmark item and select "Go parent folder".

What are you trying to do which is not working ? Could you open an issue there https://github.com/aaFn/Bookmark-search-plus-2/issues so that I see better ?
Thank you, aaFn.