Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

How can I force OSX Lion to boot into 32bit mode without having to hold 3 + 2 down on boot?

I have to use the Cisco VPN Client to connect back into work and since upgrading it no longer works on 64bit. Cisco have dropped support for the client as well.

share|improve this question

There is a Cisco VPN client built-in into Mac OS X. I am currently using it successfully to connect to my university VPN network from home.

Add it as an interface in Network Preferences -

enter image description here

Quickly connect to the VPN from the menubar -

enter image description here

share|improve this answer
The OSX client requires a shared secret which the VPN connection doesn't have. – digital Jul 22 '11 at 11:39
@digital It does. Under advanced options. I use it everyday – BinaryMisfit Jul 22 '11 at 12:53
The VPN setup itself doesn't have one to my knowledge and the OSX VPN connection requires it. Should have worded it better. – digital Jul 22 '11 at 13:44

You can modify the (found in /Library/Preferences/SystemConfiguration) file with start parameters and also the desired architecture (if you add that section to the file). See the man page here.

share|improve this answer
Does using sudo systemsetup -setkernelbootarchitecture i386 to set this, instead of editing the plist file, work in Lion? – David Jul 22 '11 at 12:19

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.