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I strongly recommend Subsurface for the Mac. It's free as in speech and as in beer, and appears to support your computer. It doesn't have the prettiest interface but it's extremely functional. I strongly prefer it to whatever commercial piece of crap was recommended with my Aqualung computer.
I have been very happy with MacDive logbook software. You can go to their website and see if your computer is compatible with the program. I have had excellent experiences with the software and customer service.
None of the suggestions above are going to result in Magic'ing an IRDA port into his Mac. (IRDA is like an infrared TV remote control) The short answer is there is no way to do this. IRDA is so old and so insecure that even Windows does not really support it anymore. I suggest keeping your out Windows computer around for when you need to talk to your Uwatech.
Ah, I interpreted this as the PC that you were downloading the dives onto, not the Dive Computer. Apologies. Does the SmartTrak software change the settings on your dive computer? I had not heard of that before. I looked briefly in the manuals for the SmartCom and SmartTrak and didn't notice changing anything on the dive computer, but possibly I didn't know what to look for. Subsurface really does list the SmartCom among its supported dive computers, which is why I mentioned it. EDIT: Ah! I see, IrDA is the problem. Sorry again. Yes, that is not a popular transfer technology anymore. Honestly, it was always pretty flaky.**How do I adjust the settings on the computer?**
.... Couldn't get the Suunto DM5 software to install properly; it never got to the part about asking for access to the documents folder and I don't know how to do it on a Mac. Tried it too many times, uninstalls, reboots, ufff....
Yeah, it was pretty neat to have for a while. In the early 90s connecting something to your computer still involved a cable, software from the manufacturer, and some obscure manual settings so the computer and the peripheral were transmitting on the same channel. USB got rid of the settings, and for a while infrared was where it was at. IrDA was considered state-of-the-art at the time because it was a standard supported by multiple manufacturers. In the wireless space there was even a watch that you could set from your computer by holding it up to your monitor as it made a seizure-inducing pattern of flashes. But then WiFi and Bluetooth came along and there was no longer any possible reason to use IR anything. The IrDA page is now littered with 5G conspiracy theories. Somehow Scuba manufacturers always manage to be on the far trailing edge of technology.Subsurface relies on the operating system to support IRDA: MacOS does not have support, Linux stopped a while ago and Windows supports it in some versions. This protocol was used by many devices about 20 years ago but today, thanks to the availability of bluetooth I think dive computers are the last devices on market that still feature it.