Mac lion 64 or 32 bit

Snow Leopard So how do you know which kernel version your machine is using?

Checking Which 32-Bit Apps May Stop Working Soon

Your machine should default into the kernel that is best supported. Keep in mind that all modern Macs and new versions of Mac OS X are going to be 64 bit, so this is really only relevant to older hardware. Enjoy this tip? Subscribe to the OSXDaily newsletter to get more of our great Apple tips, tricks, and important news delivered to your inbox! Enter your email address below:. I confirmed I had a 64 bit machine by running uname -a.

I just got a Mac Mini 4,1 it has 4GB of ram currently and It was by default running 32 bit os. Loading of the OS seems to be a little quicker, but I am not sure how stable this will be. I just tried firing up my Apps, Logic, Reason and Serato. They all loaded up, but did not try extensively to start up projects. I plan on installing FCE on here.

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I only get beeping not a single beep though if i hold the 6 and 4 down for to long, it seems to be a mac version of the default windows beeping when you accidentally depress a key for to long whilst a machine boots, or have a boot problem I guess windows nicked the idea off of the macs.

Thanks for the info on how to do this. Its sites like these that let the average pc user get the most and best experience from their machines. If you are unsure about how to figure out if you are on a bit system, please check this. Please be sure to read the entire article before proceeding.

If you are still unsure, you can […]. I have the newest Core i7 MacBook Pro and its kernel is running in bit also. I feel it is still dog slow running Aperture 3 and multiple apps at once. When I run them I get differing results. I tried the toggle and it does indeed work.

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The iMac booted OS X Is there a way to test if applications are truly running in 64 bit? So the kernal runs in 32 bit but the apps run in 64 bit?

The Apple tech notes say this very clearly. Actually, all Macs except for the Xserve default to the 32bit kernel. This is justified since the Xserve is a specialized piece of equipment where you can be sure all device drivers are built as 64bit. In the overview it will list bit Kernel and Extensions.

How to Tell if Mac is Running a bit or bit Kernel in Mac OS X

Your machine needs to have 64bit EFI, which only the newest Macs have. If you want to check for that use: ioreg -l -p IODeviceTree grep firmware-abi. Name required. Mail will not be published required. All Rights Reserved. Reproduction without explicit permission is prohibited. Last edited by ; 3 Jan, pm. Click the link I gave you and choose MAC under the big green button.

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Right, yeah. That's the problem - it doesn't work on OS X The version I had installed until the updater overwrote it did. Steam always updates to the most current version upon logging in. You can't roll that back. There has to be an archive of the older steam. I've always just cancelled the update and it worked fine.

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This time I absent mindedly clicked the wrong button :. Do you still have the previous installer saved? No, otherwise this would be easy! I thought I had, but I've a very very old one from , and then various ones from which don't work.

Nthsideplaya View Profile View Posts. Originally posted by Nthsideplaya :. I think your only option may be to update your OS to Last edited by Nthsideplaya ; 4 Jan, pm. Ah I see, well no idea then sorry.