Hi, with nearly every Version I had at some moment the same problem: Highlight, comments (a loooot of work) just vanished. I had the problem also on different MacBooks.
Can't rely on this program and it is so frustrating! Can apple please fix this problem in general?
MacBook Pro 13″, macOS 10.15
Old Toad's suggestions remain applicable: Highlighted PDF file in Preview suddenly lost all highlights (macOS Mojave)
The updated equivalent to the last link is Update macOS on Mac - Apple Support
Write back with your observations and results.
Old Toad's suggestions remain applicable: Highlighted PDF file in Preview suddenly lost all highlights (macOS Mojave)
The updated equivalent to the last link is Update macOS on Mac - Apple Support
Write back with your observations and results.
Again the same problem: Highlights in preview vanish Big Sur 11.7.2
