How to change the Mac OSX 10.5 Leopard to 64bit ?

Hi,
I am wondering how to change the Mac OSX 10.5 from 32bit to 64bit ??
I can change 10.6 Snow Leopard to 64bit by using the following command but it doesn't recognize by 10.5.
sudo systemsetup -setkernelbootarchitecture x86_64
<admin password>
Note: Restart machine to apply setting.

10.5 doesn't support 64bit.
http://support.apple.com/kb/HT3770
http://support.apple.com/kb/HT3696

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Open terminal and type the followings;
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lizardsystems.com/wiki/change_mac_address/faq/change_mac_address_in_windows_7
blog.technitium.com/2011/05/tmac-issue-with-wireless-network.html
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Hi,
For changing the MAC address for Windows 7 is designed with some limitation, we cannot get over it. Thanks for your understanding.
Under Windows 7, the possible range of spoofed addresses for wireless adapters that can be set is limited. To be used by Windows 7, a spoofed MAC address should have 0 as a least significant bit (unicast) and 1 as a second least significant
bit (locally administered) in the second nibble. Thus possible values for the second nibble are limited to 2, 6, A and E.
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n=1 --> locally administered;
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“Y” can be 2, 6, A or E.
So the possible MAC addresses in Windows 7 for wireless adapters:
X2-XX-XX-XX-XX-XX
X6-XX-XX-XX-XX-XX
XA-XX-XX-XX-XX-XX
XE-XX-XX-XX-XX-XX
For the wifi hotspot issue, please check this blog to see if it can be helpful.
Windows 7 Connectivity Problems in Public Hotspots
http://blogs.technet.com/b/patrickr/archive/2010/07/28/windows-7-connectivity-problems-in-public-hotspots.aspx
Kate Li
TechNet Community Support

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Message was edited by: softwater

How to change the hardware address (MAC) of my printer to match my mac

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Hello @giomarcondes ,
Welcome to the HP Support Forums!
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Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
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I have the mac osx version 10.5.8 how do i update it to the latest version?

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Check to make sure your applications are compatible. PowerPC applications are no longer supported after 10.6.
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