Reeder for Mac  - If you have unread news items, the dock icon looks like box filled with papers. When you have nothing to read, it looks like an empty box.
/via Bartosz

Reeder for Mac  - If you have unread news items, the dock icon looks like box filled with papers. When you have nothing to read, it looks like an empty box.

/via Bartosz

Wunderlist - The desktop version has one form for both signup and login.
/via Denise Pires

Wunderlist - The desktop version has one form for both signup and login.

/via Denise Pires

OS X - Weather widget has graphics for obscure weather conditions like a hailstorm.
/via @mesq

OS X - Weather widget has graphics for obscure weather conditions like a hailstorm.

/via @mesq

Mac OS X - Pressing Alt ⌥ and clicking the volume icon lets you select input and output device.
/via jage

Mac OS X - Pressing Alt ⌥ and clicking the volume icon lets you select input and output device.

/via jage

Alfred - Highlights the keyboard-shortcut when you disable all other GUI to access the preferences.
/via Hans Petter Eikemo 

Alfred - Highlights the keyboard-shortcut when you disable all other GUI to access the preferences.

/via Hans Petter Eikemo 

Mac App Store - The progress bar of installing an app from the Mac App Store changes its dimension separate from the icon, when magnified in the dock.

Mac App Store - The progress bar of installing an app from the Mac App Store changes its dimension separate from the icon, when magnified in the dock.

Cornerstone -  The number of segments in the spinning activity indicator equals to the number of running activities.

/via Yusuf Miles

Cornerstone -  The number of segments in the spinning activity indicator equals to the number of running activities.

/via Yusuf Miles

Twitter OS X - Replaces time of the tweet with actions on mouse over.
/via Oldstrech

Twitter OS X - Replaces time of the tweet with actions on mouse over.

/via Oldstrech

Mac App Store - When an update is available, the counter stays on even when you quit the application.
/via Ramy

Mac App Store - When an update is available, the counter stays on even when you quit the application.

/via Ramy