I use grab-site (unmaintained) for full site archival and wget -p -k
for simple non-javascript single pages
I've heard good things about HTTrack, SingleFile and Archivebox but don't have any experience with them.
Archivebox looks the most modern and intuitive but is hosted on docker
Try Transmission, it looks more akin to other mac apps as well
Idk what the issue is on macs as QT should work on macs just fine, maybe issues with libtorrent?