osx - Running prolog on a mac -

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i having hardest trouble trying run swi-prolog on mac.

when type:

/opt/bin/local/swipl

i error saying:

/opt/local/bin/swipl: no such file or directory

when type "swipl" get: 

swipl: command not found

i've tried on both terminal , xquartz. i've gone into

/applications/swi-prolog.app/contents/macos

to see if anything, prolog "welcome" text never appears. quite possibly closest ever got work when typed "pl" when inside macos folder. left terminal doing nothing , had use crtl-d.

is there i'm doing wrong? did install incorrectly?

i'm running on mac os x 10.9.1 mavericks. placed swi-prolog application application folder , downloaded xquartz per recommendation website.

if have homebrew installed, can run

brew install swi-prolog

from terminal, build source in 1 command.

you can run interpreter using swipl.


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