How to upgrade to ruby 1.9.2

Question

mac os x how to upgrade to ruby 1.9.2

Answer 1

RVM main site doesn't install properly on OS X Lion. The instructions are incorrect, the error messages it spews are incorrect (refer to non-existent log files, etc).

Route that (eventually) worked for me:

1. Open Xcode, go to Preferences - Downloads
2. Make sure that "Command Line Tools" is installed (150 MB download); this is (silently) required for Ruby to install, and used to be part of OSX / Xcode by default, but no longer
3. Ignore the RVM website - it links to bad installers for OS X (don't bother, not worth the pain. I tried them, they failed)
4. use JewelryBox, which is a little less rubbish than the official installer: http://unfiniti.com/software/mac/jewelrybox
5. Run it, click Add Ruby, select ruby-1.9.3-p125 (has to be that version or higher, or it won't compile, because the previous versions need a compiler thats no longer in OS X)
6. Select "Autodetect" and "use clang"
7. ...wait a LONG time...
8. If JewelryBox crashes immediately, it means you missed either step 2 above, or step 6 above (RVM crashes spectacularly if clang isn't installed, and neither RVM nor jewelrybox checks in advance)

NB -- downloading will take approx 5 mins; "installing" will take 30-45 mins, because everything has to be compiled. There is apparently no "normal" way of installing Ruby :(.