• After more than 15 years covering everything Apple, it’s with a heavy heart we announce that we will no longer be publishing new content on iMore and the iMore forums will be closing as of November 1st, 2024.

iMore

When I open an image or PDF with Preview and rotate it or modify it, I often find the file changed on disk afterwards. I never selected save and, in fact, when I do actually choose to save it takes much longer to save than these autosaves take.

I googled and tried all the methods proposed, including

defaults write -app 'Preview' ApplePersistence -bool no

but nothing seems to bother Preview, it still ignores my wishes and decides itself whether to save a file or not.

How can I make Preview follow my commands?