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10.6: Enable 10.5-style mouseover highlights in Stacks System 10.6
Thanks to this hint (and its original version, appearing as a link to the author's blog in this comment) about using gdb to find hidden preferences, I have discovered that it's still possible to enable automatic mouseover highlighting in stacks as you could in 10.5 (original hint).

It turns out that the name of the preference key has changed from mouse-over-hilte-stack to mouse-over-hilite-stack. So to enable mouseover highlighting of Stacks, open Terminal and run these two commands:
$ defaults write com.apple.dock mouse-over-hilite-stack -boolean yes
$ killall Dock
After that, your Dock's stack items will highlight as soon as you move the mouse over them.

[robg adds: I ran this as a separate hint from the recent Use mouse-over-highlight in 10.6's Stacks as it's been a very popular email request in my inbox, and it struck me that it was worth a standalone entry as the first use of gdb to find a hidden pref in 10.6. Note that it also works in Fan Stacks mode, which wasn't true in 10.5.]
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10.6: Enable 10.5-style mouseover highlights in Stacks | 8 comments | Create New Account
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10.6: Enable 10.5-style mouseover highlights in Stacks
Authored by: llee on Sep 17, '09 07:45:49AM

I'm certainly thrilled to see this hint! I used to use "killall Dock", until I was informed that the Applescript "tell application "Dock" to quit" is potentially less abrasive to the system. So a complete Applescript equivalent to the action might be:

do shell script "defaults write com.apple.dock mouse-over-hilite-stack -boolean yes"
tell application "Dock" to quit



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10.6: Enable 10.5-style mouseover highlights in Stacks
Authored by: bauldrywc on Sep 17, '09 07:23:06PM

I hadn't noticed before that "killall Dock" also caused the Desktop Background to cycle when it's set to automatically change pictures.



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10.6: Enable 10.5-style mouseover highlights in Stacks
Authored by: asmeurer on Sep 17, '09 08:02:23AM
Hurray! Lets get more people using the gdb trick to find those hidden preferences!

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10.6: Enable 10.5-style mouseover highlights in Stacks
Authored by: Imaria on Sep 17, '09 09:40:46AM

It's shocking how happy this single preference makes me. Now, maybe someone can drill into Quicktime X for some hidden prefs there?



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I posted this in my other hint's replies:
Authored by: slb on Sep 17, '09 11:30:49AM
I posted this in my other hint's replies:
Authored by: joelw135 on Sep 17, '09 07:29:59PM

Thanks, that works great, I didn't realize how much I missed it until now.



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10.6: Enable 10.5-style mouseover highlights in Stacks
Authored by: pendraggon87 on Sep 17, '09 01:33:02PM

The GDB trick works wonders. I have found a ton of new hints for the dock, including disabling Expose, disabling the feature where holding down an icon causes expose to appear, and what even appears to be a way to customize 4 finger swipes! (The keys are Swipe4Left, etc.)



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10.6: Enable 10.5-style mouseover highlights in Stacks
Authored by: digitol on Sep 18, '09 03:17:27AM

Ah Finally! It's sad how happy this hint makes me. "It's the little things" can not be further from the truth! Thanks for this!



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