flirc GUI ver 1.3.4
flirc firmware 3.5
Yosemite 10.10.2
When using the "Full Keyboard" controller on a MAC, the Option and Control keys are reversed. That is, when the Option key is pressed the Control key lights up on the GUI interface and when the Control key is pressed the Option key lights up. I don't know if it's just the GUI or if those keys are being incorrectly mapped. I'm just getting used to my Mac. I'm on Yosemite which I just updated to. But it also happened in the previous version. I thouhg upgrading to Yosimite might fix it but no go.
On the PC version the Control and the Alt keys appear to be mapped correctly. Can't test the equivelant of the "Option" key on a PC thouhg because it's the
"Windows" key and Win 8 immediately switches back and forth to Metro mode.
Also, Hope this helps.