macOS Preview (video or PDF) randomly resets to starting point

[Hardy Heinlin]

Hi Mac users,

am I the only one having this problem?

As usual, when I select an image file in Finder and press the spacebar, Preview will display the image. Good.

I can make the Preview screen larger and smaller with the mouse. Good.

The spacebar also works with PDF files and video files. Good.

Preview allows me to browse through the PDF pages or play the video. Good.


Random problem after one to five minutes:

• Preview resets the scaled image display to the original image size (the size used at Preview start).

• Preview resets the PDF display to page 1 (the page used at Preview start).

• Preview restarts the video at 00:00 (the point used at Preview start).


I'm unable to find any hints in the net.

This happens on Big Sur version 11.6.

The problem will not occur on my old Mac even when I use the same keyboard and mouse. So I assume there are no random events in the input hardware.


Regards,

|-|ardy


Here's a similar problem in an older Big Sur version (not exactly identical to my problem):
https://discussions.apple.com/thread/252058164

[Martin Baker]

Hi Hardy. I tried this on an iMac OS 10.14.6 and MacBook OS 12.2.1 and couldn't reproduce the issue. I use the spacebar/preview a lot but hadn't realised it could be resized. Thank you for the tip! All best, M

[simonijs]

Hi,

I don't see this happening on my (21,5" 2017) iMAC; macOS is 11.6.4.

Regards,
S.

[Hardy Heinlin]

I still can't get rid of it. It's annoying. Perhaps it's a side effect of a new security feature that does its routine every few minutes. I fear when I upgrade it will get even worse :-)


|-|