64 bit LEopard

[ex2bot]

You can address the entire 4 gb in OS X, whether you have a 32 bit or 64 bit processor in both Tiger and Leopard.

Doug

[DisabledTrucker]

Originally Posted by artov

I am thinking on buying MacBook Pro, once Leopard is available. MBP comes with 2GB memory, but it is upgradeable to 4GB. On 32 bit OS not the whole 4GB is usable, since devices use part of the memory space. But with 64 bit OS, devices can be mapped after the 4GB of memory, so one can access the whole memory.

So my question is: If I start with 2GB, there is no reason to run Leopard in 64 bit. But if I put the extra 2GB, can I just boot Leopard in 64 bit mode, or do I have to reinstall everything?

You must have Mac OS X mixed up with some other crapware, such as Vista. The Mac's use all the memory available to them and the only limitations in Leopard is the amount of memory the computer can actually hold. Well until you get well into terabytes or something like that, in other words it will more than likely never happen on one system, unless there are some serious technological advancements in the near future planned that noone is clued in on. Leopard is only a 64-bit operating system although it will also run 32-bit applications. You can read more about it here: http://www.apple.com/macosx/technology/64bit.html

[arninetyes]

Originally Posted by DisabledTrucker

You must have Mac OS X mixed up with some other crapware, such as Vista.

Yeah, it's Microsloth that has all those profit friendly packages of many, many versions of its OS. Buying a copy of Windows reminds of the old joke about buying a car -

"Oh, you want WHEELS with your new car? That'll be extra."