Search Mac Software Downloads
|
EDITOR NOTES
This program is free though donations are welcome. 100% of all donations go to the relief project "India's Street Kids" (for more info on the relief project see http://www.veronikawinter.de/Indien/
DESCRIPTION
32- or 64-bit Kernel Startup Mode Selector... Mac OS X 10.6 Snow Leopard is 64-bit - or is it?

Well, actually Mac OS X 10.6 Snow Leopard is both 32-bit and 64-bit, and what that means for you depends on both your hardware and your settings.

I put up an accompanying website which should answer most of your questions here.

What does this app do?

  • it shows whether you have a 32-bit or a 64-bit processor
  • it shows whether you have a 32-bit or a 64-bit EFI
  • it shows whether the MacOS X Kernel is set to boot in 32-bit or in 64-bit mode
  • it shows whether the MacOS X Kernel is running in 32-bit or in 64-bit mode
  • it shows whether Apple officially supports booting a 64-bit kernel on your Mac
  • it allows you to select whether you want to start the MacOS X Kernel in 32-bit or in 64-bit mode (the setting might be ignored on MacBooks, depending on how Apple implements the restriction)
  • accompanying webpage explains what the whole commotion about 32-bit and 64-bit in MacOS X Snow Leopard is about

Requirements:

To check your configuration:

  • Intel Mac
  • Mac OS X 10.4 Tiger or higher

To set the kernel's startup mode:

  • Intel Mac
  • Mac OS X 10.6 Snow Leopard or higher
  • Admin rights (as a system file needs changing)
WHAT'S NEW

Version 1.5

  • NEW: added info on new Mac models
  • Note: I had a report that the app ran fine on 10.5.8 but crashed on startup on 10.6 for one user. After two days of troubleshooting it turned out that the user had a kext which is NOT compatible with 10.6 in his system extension folder (he had previously installed an app, removed it, but forgot to remove the kext). So if you should experience weird crashes with ANY app on 10.6 which ran fine on 10.5.x then make sure you do not have incompatible extensions left in the system folder.
REQUIREMENTS
To check your configuration:
  • Intel Mac
  • Mac OS X 10.4 Tiger or later

To set the kernel's startup mode:

  • Intel Mac
  • MacOS X 10.6 Snow Leopard or higher
  • Admin rights (as a system file needs changing)

SHARE
Share
SCREENSHOT

Developer:Markus Winter
Downloads:32,375
  - Version d/l:7,161
Utilities:System
License:Free
Date:14 Nov 2009
Platform:Intel

OTHER PEOPLE SUGGEST
Suggest something else:
32- or 64-bit Kernel Startup Mode Selector User Reviews (31 posts)Write A Review
sort: smiles | time
Nov 14 2009

MITCH_DE  What .kext does the problem with 10.6 ?  
(Version 1.5)

praisebury
0
[ Reply ]
Nov 14 2009

KP4BJD  With my recent upgrade to 10.6.2 I have need to know which applications use only 32-bit kernel extensions and which run only 64-bit kexts, to help me decide whether to boot the native 64-bit Kernel or the old 32-bit one. Anyone posted a list?  
(Version 1.5)

praisebury
0
[ 1 Reply - Reply ]
Replies:
Nov 14 2009

GOOSE  Go to Activity Monitor, and you can see which applications use only 32-bit kernel extensions and which run only 64-bit kexts.  
(Version 1.5)

praisebury
+1

Sep 13 2009

THRULL  There is a preference pane for system preferences: http://www.thrull.com/corner/mac/SystemModeConfigurator/ which does similar things.  
(Version 1.4)

praisebury
-9
[ 3 Replies - Reply ]
Replies:
Sep 15 2009

MARKUS WINTER  I think you should at least mention that you are advertising your own program. What you are doing is considered very bad etiquette.  
(Version 1.4)

praisebury
+9
Sep 15 2009

THRULL  I'm sorry You feel that way it was not my intention. Yes, I'm the author and few people were interested in system preferences version which is was working on for some time. Your doing great work with Your application and charity project.  
(Version 1.4)

praisebury
0
Nov 14 2009

MGLAMB  So you came here and hijacked this developer's listing just to hawk your own product? That is despicable behavior. I would never consider using any of your products now since you show such poor ethics.  
(Version 1.5)

praisebury
0

Sep 11 2009
*****

ROBERTCOOGAN  Definitely helped me out, now I have finally installed Vista (yes, I was stoopid to buy it, but I already spent the money), so I can now use Excel 2007.

The dev has done a great job of making a low maintenance, easy to use app. The inability to use some third-party apps while in 64 bit mode is annoying, but the dev built in a really obvious warning.  
(Version 1.4)

praisebury
0
[ 2 Replies - Reply ]
Replies:
Sep 12 2009

JAMIEOHARA  sure hope you bought and OEM Vista and not retail. What's wrong with Excel 2008 on the Mac? LOL

Cheers

Jamie  
(Version 1.4)

praisebury
0
Sep 12 2009

ROBERTCOOGAN  I can't do statistics on Excel 2008 for my grad school class. Not sure if the Vista I have (home premium) is OEM or not - but it runs fine, if a bit slow.  
(Version 1.4)

praisebury
0

Sep 9 2009
****.

JOEMIKEB  Works as advertised on my 3.06GHz iMac Core 2 Duo. My only quibble is just that a quibble. It would be nice if this were a preference pane which is the only reason I did not rate it as a 5 overall.  
(Version 1.3.3)

praisebury
+1
[ Reply ]
Sep 9 2009

MARKUS WINTER  First off I wrote a little program. Nothing special but useful. Have done it before (Transform, Safari 4 Modifier) and put it out as donationware. Not that I got many.

So I think I might as well give 50% of the donations to my mothers charity. Might even result in a rise in donations. Win-win either way.

Works indeed - except that some people donate a LOT (1x $250, 1x $100, 6x $50) and it just doesn't feel right to keep 50% of that. So I decide to give everything to the relief project.

I have a website which should answer all questions about the program, and even has my home address and landline phone number. The relief project has my mother's address and landline phone number. So we are easily traced. The address of the banks and the acoount details are on there. So people can contact me, my mother, the bank if they have any doubts about the project. I put my name and reputation behind it.

And I'm getting a bit sick of people who do not read the information provided, who do not do any background checks, but think it is ok to insinuate wrongdoing on my part.

And to the ones who complain about me asking for donations - I wonder how many of you actually have donated. I have a feeling I know the answer.

Dr. Markus Winter

Im Fasanenwäldchen 4

69126 Heidelberg

Tel: +0049 (0)6221 187 0869  
(Version 1.3.3)

praisebury
+2
[ Reply ]
Sep 7 2009
*****

WILLYA  Works perfectly on my Macbook Pro. My only suggestion is to make this a System Preference pane.  
(Version 1.3)

praisebury
0
[ Reply ]
Sep 6 2009

DESIGN-Q  Sorry, can't help but to comment. Pity to the developer from all the abuses but his attitude does not help at all. All the info should be in this page since people get to know this appl. from this site mostly and did not came across directly from his accompanying website.

That aside, this app does work i.e. it sticks as oppose to the the start up shortcut 'cmd 6 4' which you have to do it each time (at this point of SL release, better this way IMHO since not many appl. take advantage of SL already).

All this depends on yr Intel Mac however i.e. pre-2007 (or something) does not work due to the HW. All being said, reading all the comments below re. users comments and developer cry about the goodwill donation to charity really give bad lights to the release here. If it is for charity, leave it to the people to decide, not pressing them with all the comments about number of visitors/downloads vs total donations received. WTF.

For those who prefer using terminal there's an easy solution at the foot of the comments (comment #1) or for start up shortcut, comment #4. Chill!  
(Version 1.3)

praisebury
+1
[ 5 Replies - Reply ]
Replies:
Sep 6 2009

DESIGN-Q  further info:

'... If you’re wondering whether your Mac has a 64-bit EFI firmware, you can type the command “ioreg -l -p IODeviceTree | grep firmware-abi” into the Terminal. The response will identify the machine as either having 32-bit or 64-bit EFI.' Quote from   
(Version 1.3)

praisebury
0
Sep 6 2009

MARKUS WINTER  Sorry, but if people are too lazy to read the website but feel the need to voice their wrong opinion about things which are explained on said website ... then that's just too much to bear.

I'm not a saint, and after about 70 emails asking things which have been explained on the website (which I answered politely as people ask me directly) I also have to deal with people who think it is in any way or form proper to mouth off here showing their ignorance - well, that's where my patience grows a bit thin. And I think justifiably so.  
(Version 1.3)

praisebury
+2
Sep 6 2009

MARKUS WINTER  P.S. And if it bothers you so much that I keep asking for donations - if it feeds just one more kid for one more day, then your bother doesn't bother me at all ;-P  
(Version 1.3)

praisebury
+2
Sep 7 2009

LIVINGS124  The way you are badgering for and listing donations here is a bit tacky, but my bigger question is why don't you link to the charity site so people can donate directly. Why are you acting as a middle man like this?  
(Version 1.3.3)

praisebury
-1
Sep 9 2009

MARKUS WINTER  @ LIVINGS124

If you had bothered to actually follow the link to the relief project then you would have found the bank information there for both the german and indian account

http://www.veronikawinter.de/Indien/English/Donations/Donations.html

Some people probably donate directly, others donate via PayPal - either way is much appreciated.  
(Version 1.3.3)

praisebury
0

Sep 6 2009

BLOOBIE  What is the point of this app, may I ask? Unless you have more than 4GB of RAM installed, then there's no need or advantage for a Mac to boot up in 64-bit mode.  
(Version 1.3)

praisebury
-7
[ 2 Replies - Reply ]
Replies:
Sep 6 2009

MARKUS WINTER  Read the website ;-)  
(Version 1.3)

praisebury
+2
Sep 6 2009

MARKUS WINTER  P.S. And in case you are too lazy the points are:

- show the state of your current Macs 64-bit readiness

- if it is possible on your Mac make it easy to switch the boot state permanently

- and most importantly: collect some money for kids much worse off than you

... and I hope you donated and didn't just come here to leave pointless remarks with zero information content - after all you could have just emailed and asked me directly, so I wonder about the need of some people to show that the HAVEN'T READ THE INFO ON THE WEBSITE!

;-P  
(Version 1.3)

praisebury
+3

Sep 4 2009

ARYA  just an idea...

perhaps you could integrate this software (or the informations provided by this software) to the system preferences?

:-)  
(Version 1.2.3)

praisebury
0
[ Reply ]
View all 31 posts >>