If Lion is 64-bit kernel only, and Apple says that Core 2 Duo and later Intel CPUs can support Lion, then some of the Core 2 Duo machines that could only run a 32-bit kernel in Snow Leopard are now enabled to run a 64-bit kernel when Lion is installed. Otherwise, Apple failed to qualify their public information correctly regarding Lion specs.
If Lion is 64-bit kernel only, and Apple says that Core 2 Duo and later Intel CPUs can support Lion, then some of the Core 2 Duo machines that could only run a 32-bit kernel in Snow Leopard are now enabled to run a 64-bit kernel when Lion is installed. Otherwise, Apple failed to qualify their public information correctly regarding Lion specs.
I see what you're getting at. I wonder if they did enable 64-bit for those C2D machines with a 32-bit bus. Anyone with a Santa Rosa (I think) machine running Lion that can shed some light?
I see what you're getting at. I wonder if they did enable 64-but for those C2D machines with a 32-but bus. Anyone with a Santa Rosa (I think) machine running Lion that can shed some light?
10.7 Lion is officially supported on Core 2 Duo Macs with 32-bit EFI, which cannot boot a 64-bit kernel. I expect 10.8 to include only a 64-bit kernel and not run on machines with 32-bit EFI.
I would not be surprised if 10.7 Lion boots the 64-bit kernel by default on Macs with 64-bit EFI, but I would be surprised if it's impossible to boot a 32-bit kernel on these machines.
10.7 Lion is officially supported on Core 2 Duo Macs with 32-bit EFI, which cannot boot a 64-bit kernel. I expect 10.8 to include only a 64-bit kernel and not run on machines with 32-bit EFI.
I would not be surprised if 10.7 Lion boots the 64-bit kernel by default on Macs with 64-bit EFI, but I would be surprised if it's impossible to boot a 32-bit kernel on these machines.
Well, as I understand it, an iMac 7,1 does have a 64-bit EFI because I ran a Terminal command (which I can't remember off-hand) that confirmed it. Nevertheless, that machine with the Merom CPU can only run a 32-bit kernel with Snow Leopard. As has been pointed out, Santa Rosa was on a 32-bit bus.
I will know for sure when I try to install Lion?say tuned for the answer to this mystery!
Well, as I understand it, an iMac 7,1 does have a 64-bit EFI because I ran a Terminal command (which I can't remember off-hand) that confirmed it. Nevertheless, that machine with the Merom CPU can only run a 32-bit kernel with Snow Leopard. As has been pointed out, Santa Rosa was on a 32-bit bus.
I will know for sure when I try to install Lion…say tuned for the answer to this mystery!
Before and after screen shots would be awesome. In fact, you can do an easy screenshot of what Startup Mode Selector displays.
Well, as I understand it, an iMac 7,1 does have a 64-bit EFI because I ran a Terminal command (which I can't remember off-hand) that confirmed it. Nevertheless, that machine with the Merom CPU can only run a 32-bit kernel with Snow Leopard. As has been pointed out, Santa Rosa was on a 32-bit bus.
I will know for sure when I try to install Lion?say tuned for the answer to this mystery!
To clarify, I did not mean that 64-bit EFI is sufficient to boot a 64-bit kernel. I meant that 64-bit EFI is necessary to boot a 64-bit kernel.
Comments
64 bit. 32-bit isn't even supported under Lion.
If Lion is 64-bit kernel only, and Apple says that Core 2 Duo and later Intel CPUs can support Lion, then some of the Core 2 Duo machines that could only run a 32-bit kernel in Snow Leopard are now enabled to run a 64-bit kernel when Lion is installed. Otherwise, Apple failed to qualify their public information correctly regarding Lion specs.
If Lion is 64-bit kernel only, and Apple says that Core 2 Duo and later Intel CPUs can support Lion, then some of the Core 2 Duo machines that could only run a 32-bit kernel in Snow Leopard are now enabled to run a 64-bit kernel when Lion is installed. Otherwise, Apple failed to qualify their public information correctly regarding Lion specs.
I see what you're getting at. I wonder if they did enable 64-bit for those C2D machines with a 32-bit bus. Anyone with a Santa Rosa (I think) machine running Lion that can shed some light?
I see what you're getting at. I wonder if they did enable 64-but for those C2D machines with a 32-but bus. Anyone with a Santa Rosa (I think) machine running Lion that can shed some light?
Santa Rosa and Merom, please. Thanks
I would not be surprised if 10.7 Lion boots the 64-bit kernel by default on Macs with 64-bit EFI, but I would be surprised if it's impossible to boot a 32-bit kernel on these machines.
10.7 Lion is officially supported on Core 2 Duo Macs with 32-bit EFI, which cannot boot a 64-bit kernel. I expect 10.8 to include only a 64-bit kernel and not run on machines with 32-bit EFI.
I would not be surprised if 10.7 Lion boots the 64-bit kernel by default on Macs with 64-bit EFI, but I would be surprised if it's impossible to boot a 32-bit kernel on these machines.
Well, as I understand it, an iMac 7,1 does have a 64-bit EFI because I ran a Terminal command (which I can't remember off-hand) that confirmed it. Nevertheless, that machine with the Merom CPU can only run a 32-bit kernel with Snow Leopard. As has been pointed out, Santa Rosa was on a 32-bit bus.
I will know for sure when I try to install Lion?say tuned for the answer to this mystery!
Well, as I understand it, an iMac 7,1 does have a 64-bit EFI because I ran a Terminal command (which I can't remember off-hand) that confirmed it. Nevertheless, that machine with the Merom CPU can only run a 32-bit kernel with Snow Leopard. As has been pointed out, Santa Rosa was on a 32-bit bus.
I will know for sure when I try to install Lion…say tuned for the answer to this mystery!
Before and after screen shots would be awesome. In fact, you can do an easy screenshot of what Startup Mode Selector displays.
Before and after screen shots would be awesome. In fact, you can do an easy screenshot of what Startup Mode Selector displays.
I took a snapshot of your suggested tool via Preview, but seem unable to import it into an AI forum.
The png snapshot shows:
Your current configuration (iMac 7,1)
64 bit processor
64 bit EFI
32 bit kernel boot mode
32 bit kernel
(deleted URL to boot loaders)
A mid 2007 24" iMac 7,1 has a 'Merom' C2D CPU.
I will post results after I try to install Lion.
Well, as I understand it, an iMac 7,1 does have a 64-bit EFI because I ran a Terminal command (which I can't remember off-hand) that confirmed it. Nevertheless, that machine with the Merom CPU can only run a 32-bit kernel with Snow Leopard. As has been pointed out, Santa Rosa was on a 32-bit bus.
I will know for sure when I try to install Lion?say tuned for the answer to this mystery!
To clarify, I did not mean that 64-bit EFI is sufficient to boot a 64-bit kernel. I meant that 64-bit EFI is necessary to boot a 64-bit kernel.
To clarify, I did not mean that 64-bit EFI is sufficient to boot a 64-bit kernel. I meant that 64-bit EFI is necessary to boot a 64-bit kernel.
Understood.
I took a snapshot of your suggested tool via Preview, but seem unable to import it into an AI forum.
The png snapshot shows:
Your current configuration (iMac 7,1)
64 bit processor
64 bit EFI
32 bit kernel boot mode
32 bit kernel
(deleted URL to boot loaders)
A mid 2007 24" iMac 7,1 has a 'Merom' C2D CPU.
I will post results after I try to install Lion.
Here are the results:
System Version
Kernel Version
Boot Volume
Boot Mode
Computer Name
User Name
Secure Virtual Memory
64-bit Kernel and Extensions
Time since boot
So, mcarling…you have it right. Those C2D machines that could only run a 32-bit kernel in SL retain that configuration in Lion.
GM Build: 11A511
GM InstallESD.dmg MD5: b5d3753c62bfb69866e94dca9336a44a
App Store Build: 11A511
App Store InstallESD.dmg MD5: b5d3753c62bfb69866e94dca9336a44a
Just letting everyone know that the official launch version IS this GM (11A511). They have been verified.
Cheers