Hi everyone,
A while back, someone reported that AntConc was not working on MacOS Sequoia 15.4, even though it was working on all other versions of MacOS. The problem seemed to be related to MacOS itself, but by rebuilding AntConc and all its libraries, I have managed to fix the problem.
If you download AntConc 3.5.1 now, it should work on all versions of MacOS, including Sequoia.
Here is a link to the standard download page: