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I tried Launchpad first time today and went through the common modifier keys & their combinations to see if some hidden options appear.

When I pressed ⌥ ALT all the apps started wiggling. What does it mean?

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up vote 3 down vote accepted

Wiggle is the edit mode. (so you can delete or uninstall the apps that came from the app store)

Holding alt is the quickest way to enter edit mode.

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What is "edit mode" then? I can reorder the apps even while nothing wiggles. Is it something else? – koiyu Aug 2 '11 at 14:28
I'll clarify the answer - it makes it so you can delete apps from the app store - i was wrong to say reorder. iOS has trained me to think you can only reorder icons in edit mode - but that's not so on the Mac Launchpad. Confusingly (to me), you can even launch an app in edit mode. – bmike Aug 2 '11 at 14:39

If you click and hold them they also start wiggling. It lets you drag them around, to re-arrange them, and also delete apps from the Mac App Store.

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Holding also wiggles—true. But I can drag them and rearrange them even when they're not wiggling; hence I presume that wiggling doesn't mean just draggability. – koiyu Aug 2 '11 at 14:16

When they are wiggling you can rearrange them AND delete/remove apps that you yourself have downloaded. System apps (like iOS) cannot be deleted.

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System apps and non-Appstore apps, it seems. Would the Appstore apps wiggle too if I had them or would they stand still? – koiyu Aug 2 '11 at 14:32

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