How can I change another user's umask on Mac OS X? This question only has answers that work on Linux.
Change another user's umask on macosx
osx;umask
Not a mac user here but I noted it a while back, while helping a family friend.you can set the umask by putting a line like this:umask 022 into one of these:~/.bash_profile~/.bash_login   (if .bash_profile does not exist)~/.profile      (if .bash_login does not exist)also, if you have it,  ~/.MacOSX/environment.plist is another place you can put the line in 