Home  •  Next Meeting  •  Contact Us  •  iCal  •  Check Email

MacGroup-Detroit    MacGroup iBBS    MacGroup iBBS  Hop To Forum Categories  Mac OS X    Snow Leopard...runs in 32-bit mode?
Go
New
Find
Notify
Tools
Reply
  
Snow Leopard...runs in 32-bit mode?
 Login/Register
 
Jedi Knight
Yahoo IM
posted
I just heard this the other day..

That Snow Leopard does not run in true 64-bit mode unless you TELL it to...by holding down "6" and "4" while the machine boots.

Anyone else know about this?

http://hothardware.com/News/Ap...t-Kernel-By-Default/


Thom
 
Posts: 189 | Registered: January 22, 2007Reply With QuoteReport This Post
Past President
Picture of Terry White
AIM: Online Status For terrywhite at mac dot com
posted Hide Post
It's true, but really depends on the Mac. "Most" intel Macs will require the reboot with the 6 and 4 keys held down to boot in 64bit mode. Some of the latest models or at least one of the latest models can boot natively in 64bit without holding down the keys.

The real question is, do you need to run in 64bit mode if you have less than 32GB of RAM?


----
You can never go wrong by doing the right thing.

http://terrywhite.com

There are two kinds of computer users: those who have lost data and those who are about to — backup your Mac!
 
Posts: 6154 | Location: Atlanta, GA | Registered: June 10, 2002Reply With QuoteReport This Post
Guru
Picture of Jack Beckman
AIM: Online Status For jcbeckman@mac.com
posted Hide Post
One of the main reasons is because while programs can run in 64 bit mode no matter of the kernel is running 32 or 64, device drivers and kernel extensions can't - they have to run in the same mode as the kernel. Since there are very few (if any) 64 bit device drivers/kernel extensions, it's safer to run in 32 bit mode as a default for now.

Any *program* that wants to run in 64-bit mode (almost everything Apple-suppied on the system, for instance) runs in 64 bit mode. Really, there are very few programs that can take advantage of 64 bit mode anyway besides large number-crunchers or large memory users (video/photography/CAD apps). But for most people, they'll never notice.


===
Professor Hubert Farnsworth: “Nothing is impossible. Not if you can imagine it. That’s what being a scientist is all about.”
Cubert J. Farnsworth: “No, that’s what being a magical elf is all about.”

 
Posts: 5473 | Location: Sterling Heights, Mi | Registered: January 25, 2004Reply With QuoteReport This Post
  Powered by Social Strata  
 

MacGroup-Detroit    MacGroup iBBS    MacGroup iBBS  Hop To Forum Categories  Mac OS X    Snow Leopard...runs in 32-bit mode?

© MacGroup-Detroit 2016

Next Meeting | Join Now | News | About MacGroup | Check Your Mail