On Mar 10, 2018, at 14:53, S. L. Garwood wrote: > I need boost 1.65 … is it available on MacPorts? All I see is 1.66
No, MacPorts provides only the current version of a port. Instructions for installing an older version of a port are here: https://trac.macports.org/wiki/howto/InstallingOlderPort However, if you downgrade boost to 1.65, that will probably break any ports you've installed that depend on boost. So I don't recommend you do that. Why do you need 1.65?