I installed Snow Leopard last night and since, I have been trying to boot it into 64-bit mode. I have tried holding down the "6" and "4" keys at startup, but that did not work.
Late 2008 2.4GHz Aluminum MacBook
I did a bit of reading on the internet, and it looks like most computers will not boot into 32-bit mode by default with 10.6. It appears that if while booting the user holds the 6 and 4 keys, the computer will boot into 64-bit mode.
Does anyone know anything about this? Will the computer always boot into 64-bit mode if this is done once? Will it even make a difference? Will the average user want to do this?
I tried to boot my mid 2009 macbook pro running snow leopard into 64 bit mode by holding down the 6 and the 4 key on the keyboard after shutting it down and then powering it back up again, it won't start up, it's stuck at the apple symbol with the rolling cursor
Info:
MacBook Pro
I have a bit of a problem: I cant access my Mac because I lost the password. I recently changed my passwords on several macs, including an old PPC PowerMac G5 from ca 2005. I run 10.5.8 on this and it works flawlessly. I need to use this machine for important work.
So this is what I have tried so far:
1) Tested with all known passwords I have used in the past.
2) Tried to boot from a 10.6 install DVD
3) Tried to boot from just C and later Command C
4) Tried a different install DVD 10.4 (I dont have the original 10.5 DVD)
5) Tried to use T and Target Disk Mode from an iMac with Lion. (disconnected all other FW disks etc.)
6) Tried different Firewire cables
7) Tried different Firewire connections.
It starts obediently and show every sign of Mac-Happiness. But I simply can't get the darn thing to boot. I think it normally should have booted using 10.6?
I'm having some problems with Snow Leopard, in 64 bit mode. Is there a way to turn it to 32 bit ? I'm using a Mac mini 2.53 GHz Core 2 Duo with 4 GB (the max it will ever have), so I don't think it needs 64 bit.
Is there any advantage/disadvantage to run in 32 bit, if you just have 4 GB of ram ?
Sleep Mode does not seem to be working automatically in Snow Leopard. It sleeps when activated from the Apple Menu but not when set to sleep in Energy Saver Preference Pane. The screen dims, goes black but the computer does not seem to sleep nor does the hard drive spin down. Anyone else having a problem like this? It was working fine in Leopard (just noticed this problem now, but have had Snow Leopard installed for a couple of weeks and never noticed it)
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Mac Pro
Just picked up a 3.2 8 core. How do i boot 64bit mode?
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Info:
MacBook, Mac OS X (10.5.6)
I need your help diagnosing this early 2007 Macbook Pro running the latest version of Snow Leopard. It isn't mine, rather my sister's, so I don't know the full details of everything as I don't see her all the time. Last December, I swapped in my 160gb 5400RPM SATA drive from my late 2006 MBP into her MBP as I had just bought and installed a 500gb 7200RPM drive into my MBP. I installed a fresh copy of Snow Leopard onto her machine, patched it up, and sent her on her way.
A few weeks ago, she came to me saying she was having trouble booting into OS X and was just having trouble using her laptop in general. The hard drive wasn't making any erratic noises, so I figured the system install had corrupted itself. The problem was I wasn't able to boot to the Snow Leopard DVD. The DVD would show up at boot when holding down the Option key to show boot devices, but when clicked, it would show the Apple logo, then the "prohibitory" symbol and the fans would spin up on full blast, with no further progress.
Booting into Single User mode, I was able to run disk repair and after running it over a few times, I was told the drive was without errors, the laptop booted fine (minus the booting to Snow Leopard DVD) and I gave the MBP back to her.
Fast forward to today, she's having issues booting in to OS X again. It'll show the Apple boot logo, but the small spinning circle will freeze, and the whole laptop will come to a halt. I still can't boot to the DVD either, with the same symptoms as above. I'm sure I can boot into Single User mode, run Disk Repair, and probably be good, but I want to attack this issue at the source.
Is the hard drive I've got in her MBP going bad (I can't hear any of the erratic noises you hear when you know a drive is going bad)? What else could it be? What about the inability to boot to the Snow Leopard DVD? What is the problem and how can I fix it? Thanks, and sorry for the long winded post.
I've seen something about com.apple.boot.plist, but I need a little more further information. After type: Code:
ioreg -p IODeviceTree -w0 -l | grep firmware-abi
I receive the following from terminal:
Code:
|| "firmware-abi" = <"EFI64">
Looks that I am able to run 64-bit kernel.
My computer is a white macbook early 2008. Core 2 Duo T8300 2.4GHz.
