I’m very happy to report that the MKVToolNix 98.0 for Mac packages are complete and available for testing 
TL;DR here are the links 
: Apple Silicon (sha-512), Intel (sha-512) and Universal (sha-512).
The Universal package will run on any Mac running macOS 13 (Ventura) or later, but if you know which kind of Mac you have, the Apple Silicon and Intel packages are smaller. (At the end of the day the Universal package includes both the Apple Silicon and Intel packages and executes the right one for your Mac when you run it. So you will get the same binary at run-time.)
I’ve tested the packages as much as I can with my limited hardware, if any of you have the chance to test the package that you prefer and let me know of any issues - or that there are no issues at all! - I’d be really grateful.
The packages are 100% built from source, signed by me and notarized by Apple (so no malicious content).
Possibly the only difference you will notice is that the app is now called MKVToolNix.app, the version number is no longer included in the app name. Oh, and the Apple Silicon release is rather … snappy.
@mbunkus is very kindly hosting the packages and will continue to manage MKVToolNix releases as he sees fit. I will merely build the ‘…for Mac’ packages and submit them for approval.
Enjoy!