ptkwt / aracnet.com (Phil Tomson) wrote in message news:<c3vtc00cqf / enews4.newsguy.com>...
> How do you get the up arrow to give prior commands in irb on OSX?
> 
> When I try to use the up arrow I just get garbage characters...
> 
> 
> Phil

Ya needs readline. Rich Kilmer wrote a great step-by-step about how to do this:

http://richkilmer.blogs.com/ether/2003/10/building_ruby_1.html