Loading on older OSX might crash

[Thomas Thomassen]

A user using OSX 10.6 reported crashes: https://extensions.sketchup.com/en/content/tt_lib%C2%B2#comment-22751

Probably because the binaries are built for 10.7. Find a way to prevent loading of binaries under older versions.

[Thomas Thomassen]

the most recent was probably this filter

sw_vers is a builtin that returns

• ProductName: Mac OS X
• ProductVersion: 10.10.1
• BuildVersion: 14B25

if  %x(sw_vers -productVersion).to_i == 10
  puts 'we have Yosemite, good to go'
else
  UI.messagebox( "This code works only for Yosemite " )
end