I have a new MacBook, but I'm finding that a lot of older software (not just amateur radio software) will not fly on the new operating system. However, I'm not highly Mac-literate, so I may be missing something. I've tried KLATrack, OrbiTrak, and SatTrak without success. I'm reluctant to pay for MacDoppler unless I know for certain that it will play nice in this environment, especially when this laptop is not going to be my primary operating computer for radio.