Mac Pro not able to boot into 64 bit kernel?

Hello,
I've been trying to boot while using the 6 and 4 buttons held down to no avail. This mac pro was bought in 2007 (work computer). Am I not able to boot into 64 bit mode with Snow Leopard? If so, does that mean I can't take advantage of the 64 bit kernel?
Thanks,
Scott

Man, Yes, when I am rendering all 8 cores in Maya, up to 4 gigs of ram are being used. Why is that so hard to believe? I should be able to render in RAM preview in After Effects a whole lot more than i can now without cacheing.!!!!
Is Maya a 64 bit application? If Maya is not using more than 4GB, than you should be talking to the Maya developers.
You should be able to use Applications -> Utilities -> Activity Monitor and look at the "Kind" field. If it says "intel (64 bits)", then it is a 64 bit application.
How many times do I have to state "YES, I will be using more than 4 gigs of RAM per program"?
Why is it the tech people really don't understand how intensive program dynamics like Maya and Blender are,
You are responding to my post, so I'm going to say, I have been working for major computer manufactures since the early 70's working with "Big Iron" computer systems, not PCs, and I most likely know a lot more about how computers work, then many computer users. Please do not tell me I do not understand. I've been working with 64 bit code since the early 90's.
and yet Apple touts their excellence in 64 bit programs like AFX, yet, I can't use more than 4 gb of RAM?
Are you saying AFX (is that After Effects?) is not a 64 bit application yet? If not, then I suggest you talk to Adobe, not Apple.
Just for fun, I wrote a sample program, which allocated a large amount of memory. I ran it on my iMac with is booted with a 32 bit 10.6.2 Snow Leopard kernel. Here are the results:
PID RESIDENT VIRTUAL PageFlt Reclaim COMMAND
54296 4.74G 9.32G 0K 0K tmp
My program has more than 4GB of physical RAM (4.74GB), and a virtual memory size of 9.32GB.
If I use Activity Monitor, I can see that my program is listed with a Kind of "intel (64 bit)".
So if Maya cannot use more than 4GB of memory, it is a Maya problem. Talk to the Maya developers.
We aren't cows Apple. We are people with limited money trying to make it in the world. Not every mac pro user is a business and we don't want too much control.
You are not talking to Apple, just other Mac users. If you wish to tell something to Apple, I would encourage you to use either:
<http://www.apple.com/feedback/macosx.html>
or
<http://bugreporter.apple.com>
Free ADC (Apple Developer Connection) account needed for BugReporter

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Can Mac mini boot into 64-bit kernel

http://macperformanceguide.com/SnowLeopard-64bit.html says:
To determine if your Mac has 32-bit or 64-bit firmware, copy/paste the following command into Terminal:
ioreg -l -p IODeviceTree | grep firmware-abi
...output:
| | "firmware-abi" = <EFI64>
As shown above, the firmware-abi has the value EFI64, indicating that my Mac Pro is 64-bit capable. If it reads EFI32, then your Mac cannot be booted into a 64-bit kernel.
...well, my Mac mini displays that EFI64 64-bit info, but when booting with the "64" keys down it nevertheless uses the 32-bit kernel.
So can the Mac mini boot into 64-bit kernel?

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If you google this issue you can find a hack to rewrite the boot firmware and allow the mini to boot into 64-bit mode. It can be dangerous to your mini if you make a mistake!
Here is one hack;
http://www.osxbook.com/blog/2009/08/31/is-your-machine-good-enough-for-snow-leop ard-k64/
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Thanks for using Apple Support Communities.
From your post it looks like you are trying to reformat your hard drive, but are unable to boot into recovery. Since you have a newer iMac, you should be able to boot to internet recovery. Booting to internet recovery occurs automatically if your startup drive has an issue. If you are seeing boot drive options when starting up, then you may just be holding down the option key on the keyboard. Both options you do see to boot from, should be able to help in reformatting your hard drive.
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This morning when I booted my Mac Pro 2009 running 10.6.8, it booted but with this error window on the desktop -
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Use the left and right arrow keys on the keyboard to select the volume you would like to use.
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via Startup Manager: How to select a startup volume
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EFI update tu support booting into 64 bit OS

Hello,
my mac (see signature) does not support booting into 64 bit in Snow Leopard. I also have troubles to install any 64 bit Windows.
The tool: http://www.ahatfullofsky.comuv.com/English/Programs/SMS/SMS.html says:
64 bit processor, 32 bit EFI, 32 bit kernel boot mode, 32 bit kernel
and its technically possible to boot into 64 bit kernel mode but it is not recommended by Apple.
It is possible to get a 64 bit EFI update to solve it?
thanks

Hi,
try this
http://www.ahatfullofsky.comuv.com/English/Programs/SMS/SMS.html
It seems that your model is in the list of supported models that can boot the 64 bit kernel.
I had the same issue with my macbook pro with identifier MacBookPro4,1 and booting with 64 bit kernel solved it.
I hope you can solve your problem!
Sorry for my bad English :-D

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Hatter: Thanks for the feedback and links. Well, as described in one of the threads you linked to, the document below reinforces your assertion that only Mac Pro's 3,1 or later (early 2008) support 64-bit booting in Snow Leopard:
http://support.apple.com/kb/HT3770
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I guess I'm mistaken. Certainly, this issue can be confusing. When I read them out loud to myself, even perfectly-written, accurate explanations on the subject can sound like a circular, non-sensical George Bush rationalization being delivered by comic Will Ferrell. I must not be correctly recalling the details of booting into 64-bit mode with this machine. And I guess that since Photoshop has its own memory management scheme, and I only have 16 gigabytes of SDRAM installed anyway, it doesn't matter that much. Furthermore, in one of your links, Jason Snell of Macworld writes:
"...If you’re running a Mac powered by an Intel Core 2 Duo processor or an Intel Xeon processor, your Mac is 64-bit capable. And Snow Leopard runs 64-bit-capable applications in 64-bit mode regardless of whether it’s booting into a 64-bit or 32-bit kernel. In fact, the only big advantage of booting into a 64-bit kernel would be the ability to use more than 32 gigabytes of RAM..."

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[URGENT] Mac Pro not booting, Fan error but fans are working.

Hello,
My server G5 is stuck on grey screen with spinning wheel. I ran the AHT and got the following:
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I have an early 2008 Mac Pro, which has re-booting problems. Also what does the spinning beach-ball indicate?

Hi, I have an early 2008 Mac Pro which has re-booting problems.
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When you have the beachball activity, note the exact time: hour, minute, second.
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
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Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
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Please don't post screenshots of log messages—post the text.
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Mac Pro not recognizing bootable DVDs and Disk Utility giving odd results.

My issue is complex, but I'll try my best to explain it as I can.
One has been resolved it seems, but I am including it so that the whole issue can be seen in context.
Friday, May 16, 2014
Last night, after rebooting my Mac Pro from my Bootcamp partition (I'm using Windows 7 Professional if that information is helpful) I received a kernel panic upon Mac OS X booting (Mac OS X 10.6.8).
My first action was to launch Disk Utility to verify the Mac HD, verify was stopped by disk utility citing that I should insert my Mac OS X install DVD and repair the disk.
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Following this I tried booting using Disk Warrior, same result again.
I tried booting both the Snow Leopard and Disk Warrior DVDs in both my upper and lower optical drives, with no change.
I decided to leave the issue and call Apple Support in the morning
Saturday, May 17, 2014
This morning I woke my Mac Pro from sleep, opened Disk Utility and tried verifying the hard drive to see if it was temporary — same result, 'please insert the Mac OS X install DVD and repair the drive.' — I also tried booting the install DVD again with no result.
I then booted my Mac into Safe Mode to check my hardware.
Upon opening Disk Utility and verifying my Mac HD — the result "Macintosh HD appears to be OK", rand the test again to see if this was an anomaly, but disk returned another pass.
I performed a normal restart of my system, although Finder was a little slower to load than normal, the system booted correctly. — I then launched Disk Utility and verified the Mac HD, it returned another pass.
This confused me, after a call to Apple Support the tech explained that 'sometime a Safe Mode boot will fix problems because it disables all non-essential processes when booting. — That makes sense to me.
However.
The issue of my Mac not recognizing bootable DVDs remains — it reads disks correctly, it just will not boot them.
Other steps I have taken to try and resolve this remaining issue.
1. a PRAM reset. — No change.
2. an SMC reset. — No change.
3. Removal of newly installed RAM. — I have tried both running the old and new RAM separately, no change using either combination.
4. Running bootable DVDs in different optical bays. — No change from both bays.
a. My upper drive is an MCE Blu-Ray/DVD combo drive, but I have booted from this drive before. (Less than six months old.)
b. My lower drive is LG DVD-RAM combo drive, I have also booted from this drive before. (Over one year old, replacement for an Apple optical drive.)
None of the above steps have helped, I still cannot boot from my optical drives — I always receive a prohibitory sign shortly after the Apple logo.
Other system information:
Mac OS X 10.6.8
8GB of RAM (4 x 2GB)
500GB Western Digital Caviar Blue HDD (less than a year old, boot drive for Mac OS X 10.6.8)
1TB Samsung HDD (for data storage and also containing Bootcamp partition)
2TB HDD (cannot remember manufacturer, contains Time Machine backups, as well as data storage)
ATI Radeon HD 5770 with 1GB of VRAM
Sorry for the long post but I really need to be able to boot from my optical drives.

Update: found an old Mountain Lion installation USB flash drive I created a while back.
I am able to boot from the ML USB flash drive, but am still unable to boot from my either my Snow Leopard Install DVD or my Disk Warrior DVD. — I have verified both DVD and they pass verification tests.
This leads me to believe that the problem resides either in the Mac, or in BOTH the Snow Leopard and Disk Warrior DVDs.
Since I am able to boot from a USB drive, I will look into the possibility of creating a bootable Snow Leopard drive, and perhaps also a Disk Warrior drive — at least until I can resolve the 'not able to boot from DVD' issue.

Do not upgrade to an IvyBridge processor if you need to boot into 32-bit mode with Lion

I recently upgraded to a MBP running the Ivybridge processor and tried to boot into 32-bit mode. Although it did boot after a short period (3-5 mins) it totally crashed a locked up. This was precursored by a graphics error and then the mouse cursor could be moved but nothing else could be done and it was only solved by a hard shut down (holding down the power button). Previously I had been running a MBP with the Sandybridge architecture and this booted fine into 32-bit mode and worked without a problem.
I spent a lot of time on the phone with Apple care who said they'd not had any reports of this issue and we went right though my system until they said there was nothing else they could do and I should try a re-install of Lion. I did this onto another hard-drive, booted into it and managed to get the machine to crash again... leading me to understand that it's nothing to do with my setup.
Thinking it might be an issue with my firmware on the mac today I visited an Apple store and tried booting 5 MacBook Pro's and a MacBook Air - all running IvyBridge - into 32-bit mode and managed to cause the same crash on all of them. If the machine is just booted an left with finder it didn't seem to want to crash but when I opened programs, mainly mac mail, it didn't take too much longer for the crash to occur.
If there are any Apple engineer reading this could you try and reproduce the issue and look at fixing this please as a lot of people still use 32-bit and if I'd known that the IvyBridge processors weren't going to work in 32-bit mode I would have stayed with the Sandybridge MBPs.
Many Thanks,
Adam Peters,

That is a pain then. Pretty much all of the OS included applications (finder, Mail, iTunes, Safari,...) are all fully 64-bit programs now (since Lion) so I can see where launching them when booted into 32-bit mode could cause stability issues.
If you boot into 32-bit mode and just run the Tascam software without launching anything else, will it work?
Was it alright in 10.6? And if so, how about keeping 10.6 in a virtual machine or on a separate disc or partition?

My mac is not able to turn on i was wondering if i could sign onto my apple ID on my iphone to get a refund for an album i accidently purchased multiple times

My mac is not able to turn on and i was wondering if i could somehow sign into my apple ID via my iphone to manage my account and get a refund for an album i had accidently purchased three times

Call.
Apple Store Customer Service at 1-800-676-2775 or visit online Help for more information.
To contact product and tech support: Contacting Apple for support and service - this includes
international calling numbers..
For Mac App Store: Apple - Support - Mac App Store.
For iTunes: Apple - Support - iTunes.

Mac Pro not able to boot into 64 bit kernel?

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