site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Le 19 août 2009 à 12:25, rohan a a écrit : I was mainly asking this from an application testing perspective. Hence, wanted to know whether there are different installation images available for 32-bit and 64-bit OS. Thanks for this. However, why then are there 4 binary types : x86, x86_64, ppc32 and ppc64 when the kernel itself is a 32-bit. Will it be able to take advantage of the other 32-bits ? On Wed, Aug 19, 2009 at 3:30 PM, Jean-Daniel Dupas<devlists@shadowlab.org> wrote: Le 19 août 2009 à 11:53, rohan a a écrit : Hi All, Does Mac OS X 10.5 provide separate 32-bit and 64-bit kernels ?Or there is only one type of kernel supported. If not are there only 2 version: Intel i386 and PowerPC ? http://developer.apple.com/documentation/Darwin/Conceptual/64bitPorting/intr... http://developer.apple.com/documentation/MacOSX/Conceptual/universal_binary/... _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... There is no such thing than 32 bit Mac OS X and 64 bit Mac OS X. The kernel can execute 32 bit and 64 bit application whatever its architecture is. A 64 bit applications run in a "64 bit" address space and uses the 64 bit ABI whatever the kernel arch is. On Wed, Aug 19, 2009 at 3:46 PM, rohan a<info1686@gmail.com> wrote: What I mean is that like Windows has separate version x86, x86_64, IA is there something like this for Mac OS X 10.5 as well ? and does the same thing run on 32-bit and 64-bit hardware ? Most (if not all) of the answers are in the 64 bit Transition Guide and in The Universal Binary programming Guide. This email sent to site_archiver@lists.apple.com