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#1
October 16th, 2007, 11:24 AM
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| 64 bit LEopard 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?  |
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#2
October 16th, 2007, 12:05 PM
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| I don't think there are 32 and 64 bits modes in Leopard. The OS is 64 bits and will exploit it if your CPU is 64 bits compatible.
__________________ My current machine is an iMac Core 2 Duo 2.16 GHz 24" with MacOS X 10.5. My Apples are here. My oldest Apple was born in 1977. GS/P/>SS d-(++) s+: a+ C+(C) U* P L+ E--- W++ N- o+ K? w O-- M++ V PS+ PE+ Y- PGP t+ 5 X+ R tv-- b+++ DI++ D+ G e+++ h---- r+++ y? Time is not changing, I'm just traveling through time. |
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#3
October 16th, 2007, 12:47 PM
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| Yup. You can't actually choose anything. It'll run 64bit code if the machine can.
__________________ macnews.net.tc is active again. iMac 24" 2.4 GHz, 4 GB RAM, 320 GB HD. Mac OS X 10.5.6 MacBook Air 13" 1.6 GHz, 2 GB RAM, 80 GB HD. Mac OS X 10.5.6 iPhone 3G 16 GB white, AppleTV 1G 40 GB Mac user since 1987, Apple Product Professional 2007, 2008. Apple Certified Support Professional 10.5 |
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#4
October 16th, 2007, 01:38 PM
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| Leopard is Automagic.
__________________ MacBook Pro 2.16GHz Core2Duo 3GB RAM, G4 1.4GHz OSX Tiger 1.25GB RAM, Dual 2GHz G5 OSX Tiger 2GB RAM (freakin shweet) Athlon 64 Windoze XP for school work (programming) 1GB RAM dferns@macosx.com |
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#5
October 22nd, 2007, 09:44 AM
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| Quote:
Maybe I'm missing something here...
__________________ Power Macintosh G4/500MHz "Yikes!" 10.4.11 Server • 1024MB • 3 x 120GB + 320GB • DVR-111D MacBook 2.0GHz Core 2 Duo - White 10.5.6 • 2048MB • 80GB • CD-RW/DVD-ROM iPhone 3G 8GB • iPod Photo 60GB • iPod nano 1GB • AT&T DSL 6Mb/768k http://www.jeffhoppe.com |
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#6
October 22nd, 2007, 10:03 AM
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| I've asked a similar question before in a VMware vs. Parallels thread. I think the answer's a bit elusive. But either way: Since Apple doesn't make us choose what to run, we'll simply get the faster version automagically.
__________________ macnews.net.tc is active again. iMac 24" 2.4 GHz, 4 GB RAM, 320 GB HD. Mac OS X 10.5.6 MacBook Air 13" 1.6 GHz, 2 GB RAM, 80 GB HD. Mac OS X 10.5.6 iPhone 3G 16 GB white, AppleTV 1G 40 GB Mac user since 1987, Apple Product Professional 2007, 2008. Apple Certified Support Professional 10.5 |
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#7
October 22nd, 2007, 02:06 PM
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| Check http://en.wikipedia.org, the figure on chapter "Virtual address space details". I guess devices will be mapped to the lower half, and user programs above them. Kernel etc. will be on top of the address space. |
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#8
October 22nd, 2007, 04:57 PM
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| You'll have to purchase the 32-bit of Leopard, mail the disc to Apple along with a small fee, and then wait for them to mail you back a 64-bit disc. ...oh wait, that's Vista.
__________________ 15" MacBook Pro: 2.33GHz Core 2 Duo / 2GB RAM / 120GB / Superdrive / Mac OS 10.5 9A581 Leopard |
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