I'm trying to create a
.chm file on a Mac, but can't seem to find an application to do it.
Are there any
.chm creators for OS X?
Not really, you could potentially run Sandcastle under Darwine or a virtual machine.
Or if you're feeling adventurous you could try using the FreePascal CHM package
Newer versions of Free Pascal (2.4.4 and newer) also have a basic commandline CHM compiler (not just library form). The command is named chmcmd