I started RoR development a few months ago, and being new to Mac...

Time flies and now I have a lot different ruby versions, rails versions and gems versions located everywhere......And currently I installed rvm and things got even worst, all things messed!

And so I started want to clean all things and use rvm again! I want to uninstall all gems, all rails, and all ruby versions, except the system's default one (the very old one born with the mac).

Or any other better solutions or suggestions!? Please help!

there is some info that I think will be useful:

which -a ruby

/opt/local/bin/ruby
/opt/local/bin/ruby
/usr/local/bin/ruby
/usr/bin/ruby
/usr/local/bin/ruby

which -a rails

/usr/local/bin/rails
/usr/bin/rails
/usr/local/bin/rails

which -a compass # simliar for rspec and many other gems

/usr/local/bin/compass
/usr/local/bin/compass

gem list

*** LOCAL GEMS ***

abstract (1.0.0)
actionmailer (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4)
actionpack (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4)
activemodel (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2)
activerecord (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4)
activeresource (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4)
activesupport (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4)
addressable (2.2.2)
arel (2.0.6, 1.0.1, 1.0.0.rc1)
authlogic (2.1.6, 2.1.3)
aws-s3 (0.6.2)
base32 (0.1.2)
block_helpers (0.3.3)
bluecloth (2.0.9)
bowline (0.9.4)
bowline-bundler (0.0.4)
bson (1.1.2)
builder (2.1.2)
bundler (1.0.2, 1.0.0)
compass (0.10.6)
crack (0.1.7)
devise (1.1.3)
diff-lcs (1.1.2)
differ (0.1.1)
dynamic_form (1.1.3)
engineyard (1.3.1)
engineyard-serverside-adapter (1.3.3)
erubis (2.6.6)
escape (0.0.4)
extlib (0.9.15)
facebooker (1.0.75)
faker (0.3.1)
faraday (0.5.3, 0.5.2)
fast_gettext (0.5.10, 0.4.17)
fastercsv (1.5.3)
fastthread (1.0.7)
ffi (0.6.3)
formatize (1.0.1)
formtastic (1.1.0, 1.0.1)
gemcutter (0.5.0)
gettext (2.1.0)
git (1.2.5)
gosu (0.7.25 universal-darwin)
haml (3.0.24, 3.0.23, 3.0.22, 3.0.21, 3.0.18)
haml-rails (0.3.4)
heroku (1.10.13, 1.9.13)
highline (1.5.2)
hirb (0.3.4, 0.3.3)
hpricot (0.8.2)
i18n (0.5.0, 0.4.2, 0.4.1, 0.3.7)
jeweler (1.4.0)
json (1.4.6)
json_pure (1.4.3)
linkedin (0.1.8)
locale (2.0.5)
mail (2.2.12, 2.2.11, 2.2.10, 2.2.9, 2.2.7, 2.2.6.1)
memcache-client (1.8.5)
meta_search (0.9.8, 0.9.7.2, 0.9.7.1, 0.9.6, 0.9.4)
mime-types (1.16)
mongo (1.1.2)
mongoid (2.0.0.beta.20)
multi_json (0.0.5)
multipart-post (1.0.1)
mysql (2.8.1)
mysql2 (0.2.6, 0.2.4, 0.2.3)
net-ldap (0.1.1)
nice-ffi (0.4)
nokogiri (1.4.4, 1.4.2)
oa-basic (0.1.6)
oa-core (0.1.6)
oa-enterprise (0.1.6)
oa-oauth (0.1.6)
oa-openid (0.1.6)
oauth (0.4.4, 0.4.3, 0.4.1)
oauth-plugin (0.4.0.pre1)
oauth2 (0.1.0)
omniauth (0.1.6)
paperclip (2.3.6, 2.3.4, 2.3.1.1)
passenger (2.2.12)
polyglot (0.3.1)
pyu-ruby-sasl (0.0.3.2)
querybuilder (0.9.2, 0.5.9)
rack (1.2.1, 1.1.0, 1.0.1)
rack-cache (0.5.3)
rack-cache-purge (0.0.2, 0.0.1)
rack-mount (0.6.13)
rack-openid (1.2.0)
rack-test (0.5.6, 0.5.4)
railroady (0.11.2)
rails (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.9, 2.3.5, 2.3.4)
railties (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2)
rake (0.8.7)
RedCloth (3.0.4)
rest-client (1.6.1)
roxml (3.1.5)
rscribd (1.2.0)
rspec (2.3.0, 2.2.0, 2.1.0, 2.0.1)
rspec-core (2.3.0, 2.2.1, 2.1.0, 2.0.1)
rspec-expectations (2.3.0, 2.2.0, 2.1.0, 2.0.1)
rspec-mocks (2.3.0, 2.2.0, 2.1.0, 2.0.1)
rspec-rails (2.3.0, 2.2.0, 2.1.0, 2.0.1)
ruby-hmac (0.4.0)
ruby-mysql (2.9.3)
ruby-ole (1.2.10.1)
ruby-openid (2.1.8)
ruby-openid-apps-discovery (1.2.0)
ruby-recaptcha (1.0.2, 1.0.0)
ruby-sdl-ffi (0.3)
ruby-termios (0.9.6)
ruby_parser (2.0.5)
rubyforge (2.0.4)
rubygame (2.6.4)
rubygems-update (1.3.7)
rubyless (0.7.0, 0.6.0, 0.3.5)
rubyntlm (0.1.1)
rubyzip2 (2.0.1)
scribd_fu (2.0.6)
searchlogic (2.4.27, 2.4.23)
sequel (3.16.0, 3.15.0, 3.13.0)
sexp_processor (3.0.5)
shoulda (2.11.3)
sinatra (1.0)
slim (0.8.0)
slim-rails (0.1.2)
spreadsheet (0.6.4.1)
sqlite3-ruby (1.3.2, 1.3.1)
ssl_requirement (0.1.0)
subdomain-fu (1.0.0.beta2, 0.5.4)
supermodel (0.1.4)
syntax (1.0.0)
taps (0.3.13, 0.3.11)
templater (1.0.0)
temple (0.1.6)
text-format (1.0.0)
text-hyphen (1.0.0)
thor (0.14.6, 0.14.4, 0.14.3, 0.14.1, 0.14.0)
tilt (1.1)
treetop (1.4.9, 1.4.8)
tzinfo (0.3.23)
uuidtools (2.1.1, 2.0.0)
validates_timeliness (3.0.0.beta.4, 2.3.1)
warden (0.10.7)
will_paginate (3.0.pre2, 2.3.15, 2.3.14)
xml-simple (1.0.12)
ya2yaml (0.30)
yajl-ruby (0.7.8, 0.7.7)
yamltest (0.7.0)
zena (0.16.9, 0.16.8)

======

I have ran sudo rvm implode and sudo rm -rf ~/.rvm, so no rvm now.

gem env

RubyGems Environment:
  - RUBYGEMS VERSION: 1.3.7
  - RUBY VERSION: 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.2.0]
  - INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.8
  - RUBY EXECUTABLE: /usr/local/bin/ruby
  - EXECUTABLE DIRECTORY: /usr/local/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-darwin-10
  - GEM PATHS:
     - /usr/local/lib/ruby/gems/1.8
     - /Users/peter/.gem/ruby/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
     - :sources => ["http://rubygems.org/", "http://gems.github.com"]
  - REMOTE SOURCES:
     - http://rubygems.org/
     - http://gems.github.com

===

ls -al /usr/local/lib/

total 5704
drwxr-xr-x  7 root  wheel      238 Jun  1  2010 .
drwxr-xr-x  9 root  wheel      306 Dec 15 16:20 ..
-rw-r--r--  1 root  wheel  1717208 Jun  1  2010 libruby-static.a
-rwxr-xr-x  1 root  wheel  1191880 Jun  1  2010 libruby.1.8.7.dylib
lrwxrwxrwx  1 root  wheel       19 Jun  1  2010 libruby.1.8.dylib -> libruby.1.8.7.dylib
lrwxrwxrwx  1 root  wheel       19 Jun  1  2010 libruby.dylib -> libruby.1.8.7.dylib
drwxr-xr-x  6 root  wheel      204 Jun  1  2010 ruby