To send a file via bluetooth in a Mac you can go to the Bluetooth icon the Menu and choose “Send File” then browse for the file you want to send.
Keep in mind that the iPhone cannot perform file transfers via Bluetooth, not yet anyway.
There is an easier method to do that in Mac OS X 10.6 Snow Leopard which is based on the Services menu.
Go to System Preferences, choose Keyboard then Keyboard Shortcuts.
Select “Services” on the left side. Find and enable “Send File To Bluetooth Device” under “Files and Folders” by clicking the checkbox.
Right click on the file you wish to send and at the bottom of the context menu you will see “Send File To Bluetooth Device”. Next the Mac will scan for available bluetooth devices.
If you are using an older Mac OS X: Leopard and Tiger then the “Send to Bluetooth Device” option is under the “More” menu item.
The following Arabic video from ArApp shows how to receive files on a Mac via bluetooth.
Inspired by this Mac 911 post on Macworld.
Arabic version of this post on SaudiMac.net.