It's been a long while since I've been in the market for a good slow down software program for my mac. What's good out there?

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"Where I came from, to get enough to eat was an achievement. To get enough to get drunk was a victory" (Brendan Behan)

Transcribe does it for me

Audacity

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“When a Cat adopts you there is nothing to be done about it except put up with it until the wind changes.” T.S. Elliot

Another free option is VLC.

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Life is good.

I've heard great things about Amazing Slow Downer as well, if you need something fairly basic.

Amazing Slow Downer is excellent: Easy to use, well laid out, any option you're likely to want or need, performs flawlessly, including on Yosemite. $49.95 USD though, so not exactly cheap, but well worth the money IMO.

Audacity is a great piece of software for this, as well as many other things, and it's free, too. Just throw your music in there and go into effect -> change speed.

http://audacity.sourceforge.net/download/

Shoot, didn't realize Amazing Slow Downer cost $$$.

Go with Audacity. Use Change Tempo if you don't want to change the pitch while slowing things down

Ah, yeah, forgot about that!
Audacity really is a fine editing tool, considering that it costs nothing - you can also use it for EQing, et cetera. I run Pro Tools as well, esp. for mixing, but I usually edit stuff on audacity because it is so convenient to do (PT can be a bit cumbersome).