We need a total of 4 icons for an OS/X application:

* Application icon.
* Menu bar icon for application in inactive state.
* Menu bar icon for application in pending state.
* Menu bar icon for application in active state.

The 4 icons would probably be quite similar to each other, just modified to reflect the different states.

Each icon needs to be provided in the typical OS/X sizes:

icon_16x16.png
icon_16x16@2x.png
icon_32x32.png
icon_32x32@2x.png
icon_128x128.png
icon_128x128@2x.png
icon_256x256.png
icon_256x256@2x.png
icon_512x512.png
icon_512x512@2x.png

As well as an SVG version which can be used for future artwork.

We have other products too - for the right person this may be a repeat job. If you're interested, please PM me for more details.