So, with Snow Leopard, there is a 32-bit kernel, and a 64-bit kernel. Correct?
As I understand it, it will boot into the 32-bit kernel by default, but if your hardware is supported, you can select the 64-bit kernel.
My question is - where is the list of supported hardware, and how do you select the 64-bit kernel?
My confusion comes from several posts and various articles which all say the first-gen aluminium iMac has a 32-bit EFI, and therefore can only boot into the 32-bit kernel. But I've just downloaded an app called Startup Mode Selector, which shows you your system config, and it says I have a 64-bit EFI.
It appears that for whatever reason, the kernel on my Mac is 32bit/i386, but the architecture is 64bit: Darwin system.local 11.3.0 Darwin Kernel Version 11.3.0: Thu Jan 12 18:48:32 PST 2012; root:xnu-1699.24.23~1/RELEASE_I386 i386
Though the kernel itself is a universal binary: mach_kernel: Mach-O universal binary with 2 architectures mach_kernel (for architecture x86_64):†Mach-O 64-bit executable x86_64 mach_kernel (for architecture i386):†Mach-O executable i386
Model Name:¬†MacBook ProModel Identifier:¬†¬†MacBookPro3,1Processor Name:¬†¬†Intel Core 2 DuoProcessor Speed:¬†2.4 GHzNumber Of Processors:¬†1Total Number Of Cores:2L2 Cache:¬†4 MBMemory:¬†8 GBBus Speed:800 MHzBoot ROM Version:¬†MBP31.0070.B07SMC Version (system):1.18f5¬†¬†
I know this has been asked numerous times, but most of the answers I found were old and archived. I was wondering whether or not an update or a guide has been released which allows a successful boot into 64bit kernel? ¬†On a side note, I have verified my computer does have EFI64. However I know in the past that this stil didn't enable a 64bit boot.¬†
Whether anybody got Snow Leo build 10A380 (WWDC'09) successfully running with 64-bit kernel? If 'yes' - please share your method. I've tried every approach that i know: "6+4" keys, arch=x86_64 flag specified for both nvram and com.apple.Boot.plist, lipo command against mach_kernel.
just got me a brand new 2010 MacPro 2 x 2.4 Quad-Core with 12GB Ram and the ATI 5870. This is the first MacPro to system boot into the 64bit Kernel by default (ie, hold 3+2 on restart to boot into 32bit Kernel). One of the first things I did was run the Photoshop performance test, which FYI on my old G5 2.7 with 4GB Ram returned a time of 114 secs, and on the new Quad-Core in 64bit kernel returned a time of 14 secs, so as you can imagine I was pretty happy with the results.
Then the problems started...... when I was installing software I got the dreaded Kernel Panic, restart your machine screen. So I did, and it happened again on restart, so I did, and it happened again on restart, so I did.... you get the idea. So I put the system disk in and restarted, then reloaded OSX10.6.4 and everything seemed to be going fine, until I installed software again (different app from the first time), and I got the Kernel panic screen, then again on restart etc, so I booted into 32bit kernel and all is good. EXCEPT! - When running the Photoshop test in 32bit Kernel it returned a time of 17secs. Now, I know I am being picky here, but I do a lot of work in PSCS5, and by a lot I mean sometimes all day on large photographic images, so 3 secs is a big deal....
I convinced/helped a friend upgrade her 1.83Ghz CD MacBook to Snow Leopard. It has not been a smooth ride. Right off the bat there have been persistent and recurring DNS problems. She has also found that it won't shut down without her going through and quitting or force quitting open apps--skype being of particular issue. Tonight she had a kernel panic, it seems. It appears skype is the problem app, but this didn't occur before the SL upgrade. Is it coincidental or correlated?
I currently have external storage devices by DataRobotics - 2 DroboPro and 1 DroboElite. I bought the new MacPro 2 months ago and have been having problems with the Drobo devices disconnecting constantly. After a lot of diagnostics including Apple replacing the logic board in my MacPro, it was identified that the issue was with the iSCSI initiator that DataRobotics uses. It is not 64bit kernal compatible and as a result, the drives disconnect randomly especially when moving data from one external drive to the other. I am forced to boot the MacPro in 32bit kernel mode for the drives to work properly. DataRobotics is not committing to fixing the 64bit kernel issue so I'm now looking to replace this technology.
I found some interesting technology by Netgear and was considering buying their product, however, I had the worst experience ever with dealing with pre-sales & technical support department, after dealing with 4 different individuals, I concluded that they have no clue about their own products, the staff is so junior, it's as if I called a completely different company when talking about their own product. I am therefore going to stay away from that company.
Just wondering what the thoughts everybody was having regarding loading Snow Leopard with a 32bit kernel (i.e. "normal" install) or 64 bit kernel (i.e. holding down the "6" and "4" keys during reboot).
Is there something about the hardware on this iMac that will not let SL run in full 64 bit glory? It loads 64 bit kernel, but did that in Leopard as well. SL loads the 64 bit kernel but not the rest of it... of course holding the 6 and 4 keys results in no joy. So now I suspect it is not just the CPU that must be a 64 bit ready chip but the rest of the hardware must be like wise optimized.
I am pretty new to the forums but I installed snow leopard on an 2008 iMac 2.4 ghz, 3gb of ram and 250gb hard drive on September 1, 2009 and had no problems shutting down.
Then on Wednesday when I shut down it goes into a kernel panic and tells me to restart. When I go into the other user account it does not do that. I have a picture of the error log that i got when I started the computer up to submit to Apple. Can someone please help.
I have reset PRam, repaired permissions, and reinstalled Snow Leopard but recovered it from a Time Machine Backup. I do not know what to do.
First the bad news - consistent kernel panics Good news - found a remedy in disabling my screen saver. I'd like to use my screen saver without getting kernel panics. I've tried erasing my drive and restoring from a back up. resetting PRAM, repaired permissions and ran Tech Tool Pro 5 (file structures and repaired permissions, everything else checked out fine).
I'm running a MacBook Pro (15-inch, Mid 2009) and am getting daily (sometimes multiple daily) kernel panics. It's been months since hardware changes (upgraded to 8Gb RAM, quality modules that work fine on other identical Macs). Today is the first day that it's happened more than once, but I hope that's not a sign of things to come...¬†Here are Pastebin dumps of the Problem Report, System log, and Console log.¬†
I haven't done any serious software updates in a while, but I did set up a Windows XP VM in Parallels Desktop, which has been running during most kernel panics. Maybe bad drivers that are incompatible or need updating? It sometimes runs for hours before a panic, so I don't think running in Safe Mode would be effective (unless I take it home overnight, which I may try). It seems that my problem is similar to another thread I found on this forum, but mine is a bit different, and I don't run any microsoft hardware (Logitech keyboard and mouse).
Info: MacBook Pro, Mac OS X (10.6.8), 15" 2009, 2.66GHz, 8Gb RAM
Apple's site about Snow Leopard says that 64-bit *apps* under Snow Leopard will be more secure than ever due to several things:A more secure function argument-passing mechanism and the use of hardware-based execute disable for heap memory.
Memory on the system heap is marked using strengthened checksums, helping to prevent attacks that rely on corrupting memory.
Nerdly question, but does anyone know if any of these types of security enhancements require the 64-bit *kernel* (not just a given app)? My white Macbook (C2duo) is unlikely to run 64-bit unless Apple lets it in their final release (it apparently won't so far as they haven't written drivers for my lowly machine).
I've upgraded my MBP to Snow Leopard today from Leopard and I'm getting a Kernel Panic when I login as one user. Logging in as an Admin user or a new user account is fine, and I still get the Kernel Panic if I boot up in to Safe Mode. It's obviously a problem with the user account and looking at the dump log it seems to be caused trying to mount something, but I can't for the life of me track it down.
Installed Snow Leopard (retail box) onto a last-gen Aluminum MacBook Pro (2.6Ghz model). Did a time machine backup. Put in CD and upgraded. Rebooted with no peripherals plugged in and I get a kernel panic. There's only one user on this machine so I can't see if it's an account problem. I did the same thing on both my Macbook Air and 17" MacBook Pro.
Question: Do I have to now Reinstall Leopard (fresh) Then update Snow Leopard Then restore from Backup? OR Install Leopard Recover from time machine backup Then install Snow Leopard
I don't have all day and really don't want to screw up the process. Is there any thing else that might say why this kernel panic is happening?
Over the weekend I tried to backup my MacBook Pro onto an external harddrive, and when about 23Gb out of 110Gb were completed, my mac went into a kernel panic ("You need to restart your computer. hold down the power button until it turns off, then press the power button again." in four languages). Previous backups went fine. So I did a reformat of the ext. hdd, same thing: after about 20 or so Gb of backup, the msg. pops. otherwise the mac runs without problems. Did a virus check, which came up negative.
Here is the panic log: Interval Since Last Panic Report: -6 sec Panics Since Last Report:†1 Anonymous UUID:†7254B2B2-A9E2-40B3-9A00-06A141425C7F Mon May 28 06:53:53 2012 panic(cpu 0 caller 0x2abf6a): Kernel trap at 0x00270ea8, type 14=page fault, registers: .....
So out of nowhere my unibody MBP (specs, etc below) locked up yesterday while I was watching a video using VLC.¬† It stopped responding to anything so I held down the power button until it turned off.¬† I waited about 10 minutes and turned it back on.¬† Grey screen with spinning cog showed up for about a minute and then kernel panic.¬† Held down power button until it turned off.¬† Tried repeatedly - same results.¬† Won't boot into Safe Mode - still get a kernel panic everytime.¬† It will let me boot the machine into Target Disk Mode.¬† It will boot from my Snow Leopard install disk where I ran Disk Utility and "repaired disk" and "repaired disk permissions" on both the drive and the volume.¬† All the "repair disk" and "repair disk permissions" ended with messages in green type saying that the disk/permissions appear to be OK.¬†
I have an external FW drive used for TM backups for the machine.¬† A fair amount of data has been added since the last TM backup (which was less than 30 days ago) that, ideally, I'd like to not lose by resorting to restoring from a TM backup.¬† It's not the end of the world if the last (roughly) 30 days of data/changes ends up being lost, but I'm willing to work on getting it back up and running without doing an erase and install and then restoring from a TM backup if at all possible.¬†
Definitely if any other information or data is needed from me in order for anyone to assist, please let me know what it is and I'll do my best to provide it.¬†
Hardware Overview:Model Name: MacBook ProModel Identifier: MacBookPro5,1Processor Name: Intel Core 2 DuoProcessor Speed: 2.66 GHzNumber of Processors: 1Total Number Of Cores: 2L2 Cache: 6 MBMemory: 4 GBBus Speed: 1.07 GHzBoot ROM Version: MBP51.007E.B06SMC Version (system): 1.41f2¬†
How's it going everyone, I'm fairly new to Mac and I'm not very technical at all. I just purchased an i7 15" and I'm confused when it comes to 64bit vs 32bit. Does the computer automatically switch between the two or is there something you have to specifically do to run one or the other? For instance, I downloaded Handbrake last night, it asked if I wanted 64bit or 32bit? I have no clue? I bought a powerful machine, I want to make sure I utilize it.
Im about to recieve my MPro w/8800, and plan to have a dedicated HD for Windows in bootcamp. Windows will be used exclusively for gaming (real-time-strategy games mostly, if this matters).
I am keen on going into Vista, trading a bit of XP performance/stability towards full/hassel-free compatibility with Directx10 and future games, but have no clue whether it makes sense or not to go with the 64 bit version.
I understand this version allows to use much more RAM (which i will have installed on the MPro), AND more than a single core used.
What i dont have a clue about is wether the 64bit version is compatible with all (or grand majority) of games, whether they do actually take advantages of the 64 bit possibility (which im not sure at all, as i believe you have to program it to do so), etc.