My macbook pro running Tahoe Version 26.6.2 (25G83) does not recognize Audacity 4 as a program that can open wav files. I didn’t try other audio formats.
Also, the cut and paste command keys do not work. I had to use the menus to cut and paste. The keyborad delete key doesn’t work either I had to right mouse click to cut.
I was attempting to generate 2 seconds of silence at the end of my file. It kept adding it to the beginning instead of where I was. It took me about 10 tries to get it where I wanted it.