Hi it looks like Aja IO LA works also on OSX Mountain Lion 10.8.5
but only with the latest ProIO_ControlPanel_v1.2 that also give you the new Firmware version 5.8 to the AJA IO LA
and driver version AJA_Io_v3.1 and the Capture software AJA_VTR_Xchangev4
so all those 3 files you need to get AJA IO LA to work
one more thing you need also for AJA_VTR_Xchangev4 to work and recognise AJA IO LA is to copy QT .component files to
Library/Quicktime/ folder
here is the guide how to do it and the files
https://studioartist.ning.com/forum/...mac-if-you-don
the QT .component files look like this in the picture "Appel_Prores_codec.png" that you copy to the Library/Quicktime/ folder
otherwise you have to install Final Cut to get AJA_VTR_Xchangev4 to work