I can't get it to work on my mac either....just bought a windows laptop LOLI received my R7 (ver 121 firmware) from Amazon yesterday and had the same issue with my Mac running Catalina 10.15.4. I tried downloading the ver 124 files since the latest ver 129 files for Macs are not yet on the Uniden site. However, I could not get the R7 to connect to the Mac, even after 4-5 installs/uninstalls. I ended up pulling out an old Windows 7 PC and updated it to the latest OS for Win 7. Then I downloaded the drivers, updater tool, firmware, etc. from Uniden’s site and everything worked fine...R7 connected to the Win7 PC with no problems.
The problem is not the firmware. The 129 firmware file is the same for mac or windows.
I personally stopped my Mac at 10.14.5. Every time I update my Mac its Russian roulette as to what might work and what might not. Generally I will only now update my Mac until a time comes I have software which doesn't work on it unless its updated. When that happens I'll probably get a newer Mac!
Please don't blame Uniden, I've developed some apps for iPhone and after several versions I gave up. Maintaining updates for new apple OS versions is not worth the hassle for a small developer. I much prefer Apple to windows, but for a software developer they don't make it easy. It's so hard to figure out sometimes, why something suddenly stops working after an update. Apple are not very helpful when it comes to assisting you to make the transition to a new update.
As others have said, you're quite fortunate that Uniden provide a version which is compatible with Mac. Uniden probably just don't have adequate resources to regularly release upload tool updates. Uniden NZ never released any version which can be installed on Mac. Same applies to DFR7 and DFR9.
Err, No! Quite a few people over the last year have suggested I should! If Uniden allowed me access to work on firmware updates, and to assist me to support upload tools, I'd build in a lot more functionality and flexibility. E.g. to provide more advanced options on the detectors, as well as providing more updates for other models such as the R3, R1, and DFR9 as well as more tools to support Mac users. I completely agree there's a hell of a lot more they could be doing but are just not doing. At least I have fully opened up the gps database for now, and within the last few months I have started working on firmware. It's hard work reverse engineering, and why the hell should I have to do that, just to provide something Uniden should have already done!? Why would you deliberately provide new 129 R7 firmware which cut out low K band performance that worked so well on the 124 firmware, and not even tell anyone (i.e. R7 129 lower limit on K band (K Wide) is now 24.050, previously 23.900 in 124 firmware)!?
I tried updating my R3 with the uniden on a mac. I can run it but, after the reset the Version No does not show up ... and it is still at 1.5 rather than the 1.53 which I ran so I am in the process of re doing it on a PC.