Installing more than one version of Erlang/OTP on a machine

Question

Is this possible to have different versions of Erlang/OTP installed simultaneously on the same platform?

Answer 1

On a Mac, Macport helps switching, even between versions it covers and newer ones.

E.g. with Erlang 17 installed directly from Erlang Solutions, you could switch back to RB1603 (open a new terminal window afterwards):

sudo port activate erlang @R16B03-1_0+hipe+ssl

Switch back to Erlang 17 by _de_activating the Macports install (and open a new terminal window afterwards):

sudo port deactivate erlang @R16B03-1_0+hipe+ssl

List all versions you have installed with:

port installed erlang