If that's really what you want then you need to write code to put on the dongle which communicates with your ek board via bluetooth and sends/receives data in and out the usb serial port (/dev/cu.). Then you talk to the dongle from your mac over serial.
Sort of hard to know why you'd want to do that. That means writing an app for your ek, and app for the dongle which translates between serial port and BTLE and an app for OSX which talks to the serial port. Is that really what you want?
If you just want to talk BTLE to the EK why can't you use the OSX BTLE libraries.
If that's really what you want then you need to write code to put on the dongle which communicates with your ek board via bluetooth and sends/receives data in and out the usb serial port (/dev/cu.). Then you talk to the dongle from your mac over serial.
Sort of hard to know why you'd want to do that. That means writing an app for your ek, and app for the dongle which translates between serial port and BTLE and an app for OSX which talks to the serial port. Is that really what you want?
If you just want to talk BTLE to the EK why can't you use the OSX BTLE libraries.
