Is there any way I can change the rate in which OS X progresses through images in a slideshow, particularly in Preview?
[Update: I'm not entirely convinced that Preview is using the JustASlide slideshow settings. It might be using another preset, or something entirely unrelated. If I set the value lower, say to 1, it doesn't seem to move as quickly as I'd expect.]
I had this same question and couldn't find an obvious answer online. sameers' answer provided enough detail to find the path, and luckily there are built-in commands to edit plist files in OS X.
Using these steps, I was able to change Preview's slideshow delay from 3 seconds to 2 seconds. This should also work on 10.8, and any other version of OS X where this file is present, though I've only tested in 10.9.
A word of warning: the value we're changing is an integer value by default. Depending on how Preview interprets these values, you not be able to set partial seconds. I haven't tested this, and would advise caution. Nothing will explode, but you could potentially introduce bugs/crashes. If you decide to experiment, you should change the
Here's the list of commands to run in Terminal:
Now, launch Preview.app (quit it first if it's already running), and test to see the new slideshow settings in action!
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.
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
Note that you have to be a root account on your machine or use the sudo command
This isn't a real answer to your question, but it's a workaround I use for the same problem, and is easier to adjust on the fly than a p-list anyway if I want different delays.
Just select the files you want to slideshow in the finder, and then run this Applescipt:
And it'll ask you how long of a delay you'd like, then it will slideshow the files with that delay. Best to run it from Applescript Editor, so you can stop the script if you want to stop the slideshow before it shows all the files, or else it's going to keep hitting the right arrow key at whatever delay you set once for each file you had selected and hadn't viewed yet. It's just using UI scripting for the slideshow and hitting the error key for you.