Apple - How to set an iTerm2 startup command

Profiles -> General -> Command

Everytime you open a new tab your bash profile will be sourced.

Got it, there is an option added in the development branch of iTerm that adds a "Send text at start" option to the profile settings. This will eventually be added to a (more) stable version of iTerm.

In iTerm2, preferences>profiles>tab general, there is an option in Command called send text at start that executes any command you put there after login.

In particular, I typically have

source ~/.virtualenvs/.../bin/activate

for profiles that use Python.