Classic MacOS was designed to support handling events from the keyboard, mouse and floppy in 1984 and adding events from the internet broke it. It was fun using a Mac and being able to get all your work done without touching a command line, but for a while it crashed, crashed and crashed when you tried to browse the web until that fateful version where they added locks to stop the crashes but then it was beachball... beachball... beachball...
They took investment from Microsoft at their bottom and then they came out with OS X which is as POSIXy as any modern OS and was able to handle running a web browser.
In the 1990s you could also run Linux and at the time I thought Linux was far ahead of Windows in every way. Granted there were many categories of software like office suites that were not available, but installing most software was
./configure
make
sudo make install
but if your system was unusual (Linux in 1994, Solaris in 2004) you might need to patch the source somewhere.