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?
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?