Since upgrading to Yosemite I having trouble using my Ruby apps. I thought it was related to the app itself ( livereload ) but I get the same error on other web development apps. I've googled to no avail and am not proficient enough with Ruby to debug myself...
Here is the output if anyone could shed any light?
/Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:212:in `initialize': Permission denied - /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-14/2.0.0/nokogiri-1.6.1/gem_make.out (Errno::EACCES)
from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:212:in `open'
from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:212:in `write_gem_make_out'
from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:132:in `build_error'
from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:171:in `rescue in build_extension'
from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:156:in `build_extension'
from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:198:in `block in build_extensions'
from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:195:in `each'
from /Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:195:in `build_extensions'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:1436:in `block in build_extensions'
from /Library/Ruby/Site/2.0.0/rubygems/user_interaction.rb:45:in `use_ui'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:1434:in `build_extensions'
from /Library/Ruby/Site/2.0.0/rubygems/stub_specification.rb:60:in `build_extensions'
from /Library/Ruby/Site/2.0.0/rubygems/basic_specification.rb:56:in `contains_requirable_file?'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:925:in `block in find_inactive_by_path'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:924:in `each'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:924:in `find'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:924:in `find_inactive_by_path'
from /Library/Ruby/Site/2.0.0/rubygems.rb:185:in `try_activate'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:132:in `rescue in require'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:144:in `require'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/lib/compass/sass_extensions/sprites/engines/chunky_png_engine.rb:2:in `<top (required)>'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/lib/compass/sass_extensions/sprites/engines.rb:25:in `<top (required)>'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/lib/compass/sass_extensions/sprites.rb:18:in `<top (required)>'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/lib/compass/sass_extensions.rb:10:in `<top (required)>'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/lib/compass.rb:5:in `block in <top (required)>'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/lib/compass.rb:4:in `each'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/lib/compass.rb:4:in `<top (required)>'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/bin/compass:20:in `block in <main>'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/bin/compass:8:in `fallback_load_path'
from /Applications/LiveReload.app/Contents/Resources/SASS.lrplugin/lib/compass/bin/compass:19:in `<main>'