really, chflags is part of os x now? I thought that was part of a separate package.
itself has been inside Mac OSX since day one (i.e., as a standard Unix item).
"flag" however first appeared in Leopard (i.e., as a non
-Unix, Apple-only option).
Clarification: that flag has always existed as part of Finder (where utilities like ResEdit and File Buddy, etc. were needed to tweak icon visibility). But the ability for the chflags
command to toggle that Finder flag was introduced in OSX 10.5