GrootWitBaas Posted December 11, 2009 Share Posted December 11, 2009 I found this to share with you guys. http://events.ccc.de/congress/2007/Fahrpla..._osx_kernel.pdf From this file : The OS X kernel is not 64 bit. It supports 64 bit user mode applications on a 64 bit PowerPC or Intel CPU, but the kernel itself runs in 32 bit mode and is bound to the 4 GB address space limit. So to answer the original post of Envying ....and he has done this himself already ....Yes, Kernel is the core of an OS, Mach_kernel is a universal binary file using ppc & i386(not x86 64) instructions... So can I say Leopard is not a real 64bit OS! for now...... That probably explains why my vanilla install (using 10.6 retail) fails with more than 4GB Link to comment https://www.insanelymac.com/forum/topic/101948-is-leopard-a-real-64bit-os/page/3/#findComment-1356502 Share on other sites More sharing options...
thomsn Posted January 30, 2010 Share Posted January 30, 2010 Ist it a 4GB or the 3 to 3,5 GB limit? Link to comment https://www.insanelymac.com/forum/topic/101948-is-leopard-a-real-64bit-os/page/3/#findComment-1400104 Share on other sites More sharing options...
andarion Posted May 23, 2010 Share Posted May 23, 2010 It's not a 64 bit OS, it's a 32 bit OS that you can run 64 bit applications on. Link to comment https://www.insanelymac.com/forum/topic/101948-is-leopard-a-real-64bit-os/page/3/#findComment-1473741 Share on other sites More sharing options...
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