On Wednesday 18 Jan 2012 13:13:04 you wrote: > 4.0 is certainly a minimum version. Do you know which ICU versions did the > upgrade to 5.2 and 6.0? > > Lars Yep, ICU 4.4 got Unicode 5.2 and ICU 4.6 got Unicode 6.0. OSX 10.7 shipped with ICU 4.6. John.