On Wed, Aug 05, 2015 at 04:34:20PM -0700, Matthew N. wrote: > On 2015-08-05 4:28 PM, Martin Thomson wrote: > >On Wed, Aug 5, 2015 at 3:59 PM, Matthew N. <ma...@mozilla.com> wrote: > >>If we have data on CPU architecture I don't think the OS version is > >>relevant unless I'm missing something. > > > >My understanding is that OS version is all that matters. 64-bit apps > >require a 64-bit OS. (Such an OS requires a 64-bit processor of > >course.) > > All of our supported versions of OS X can run on 64-bit hardware[1] > though AFAICT. > > [1] "Platforms: IA-32, x86-64[2]" > https://en.wikipedia.org/wiki/Mac_OS_X_Snow_Leopard
Snow Leopard boots with a 32-bits kernel on many types of machines. At the time it was released essentially only Xserves would boot the 64-bits kernel by default. One factor is whether the EFI firmware is 32 or 64 bits. Now, looking around, there are claims that 64-bits applications can run on the 32-bits kernel, but I'm dubious of that fact. It may well be that people /think/ they're running 64-bits applications, but like Firefox, they might just have been universal binaries and they were actually running the 32-bits part. It would be worth checking, though. Mike _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
