I'm sorry, you're correct, it's still there
I just went back to my control panel and this time I had no issue finding my posts. Must have had a bad brainy episode yesterday, when I couldn't find them
Anyway, thanks for responding on the original post. The reason I'm still on Yosemite is that a) You're right that my hardware (2015 Air) supports newer versions, but El Capitan introduced SIP which breaks some software I rely on. And b) I'm a 45-year-old grumpy developer, so I'm naturally adverse to anything new, and I hate the newer macOSes
Your suggestion doesn't apply, though. I do know about Gatekeeper, and on Yosemite it works in the way that you'll get a message that the app you're opening is from an unidentified developer, and going to security settings in system prefs you get the option to open it anyway. Which has always worked with MakeMKV until now. Just to be absolutely sure, I just tried right-clicking and opening that way, and I get the same message that the app is damaged.
Usually when an app is no longer compiled to be compatible with my beautiful Yosemite OS, the icon will reflect it by becoming grayscale with a "no entry" icon superposed on top of it. Not here, it's a different behavior from what I've seen before. This "the app is damaged" message is special.
In the OP I included the console log because I suspect it may have to do with the signing certificate. I previously had to copy over root certificates from a newer version of macOS after the heartbleed vulnerability invalidated a bunch of root certificates and these weren't distributed to Yosemite since it's EOL from Apple.
So... Yeah. I don't know. If I were the developer of MakeMKV and not an old grumpy fart like me that wishes somehow we could fork macOS at 10.10 and create a better OS, then I'd just go, "tough luck, boomer, Imma update the description to say version something-higher-than-yosemite-minimum and not spend more of my precious time on this," but I'm kinda hoping that since MakeMKV has been supporting 10.7+ for so long it's because somewhere there's an old grumpy fart like me in charge
![Very Happy :D](./images/smilies/icon_biggrin.gif)