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Is there any way I can change the rate in which OS X progresses through images in a slideshow, particularly in Preview?

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2 Answers

I was about to say no, but there's actually a way you can use Terminal to hack your system's settings for the default operating system image slideshow. :P

Here are two helpful links, the second one more in-depth: http://www.macosxhints.com/article.php?story=20050904053501814 http://www.macworld.com/article/49110/2006/01/sspanelset.html

Also, just a warning, these tutorials seem to be designed for Mac OS 10.4. I don't know if these work work on 10.5 or 10.6, but you can try it, it will hopefully be the same feature.

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Thank you, but this does not solve my problem. I would like to be able to control the rate in which the slideshow changes images, not how long it takes for the control panel to disappear. Those links are what came up when I tried to google it. –  Orion751 Aug 13 '10 at 19:11
Oh, sorry about that, I see. I don't know if it's possible without some other kind of hack, and I don't know if there's a hack for that. You could try another program like iPhoto or Picasa, they should have editable slideshow speeds. The standard slideshow in Finder and Preview is very simplistic. –  Nicolas McCurdy Aug 13 '10 at 19:43
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I was able to get this solution to work on Lion (10.8) - here's how you can do it if you install PList Edit Pro, plus the command line interface, via your command line

Bash$> sudo /usr/libexec/plistbuddy -c 'Set JustASlide:mainDuration 1' /System/Library/PrivateFrameworks/Slideshows.framework/Versions/A/Resources/Content/EffectDescriptions.plist

Note that you have to be a root account on your machine or use the sudo command

Bash$> /usr/libexec/plistbuddy -c 'Print JustASlide:mainDuration' /System/Library/PrivateFrameworks/Slideshows.framework/Versions/A/Resources/Content/EffectDescriptions.plist
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