Self-extracting is nice if it's only passed around on Mac disks. Once you upload it to the Internet, download it, transfer it through a PC... things get pretty garbled. ResEdit will be able to reset its type to APPL, though.

I never understood why Stuffit Expander was, more often than not, distributed in the format that required and existing Stuffit installation to open it. xx(

Click to expand...

Same here, but I think it's typically in the self-extracting archive. Nowadays it is in a Mac OS X installer.