Cisco VPN Client for Mac Lion

Did you known that the Cisco VPN client for OS X did not work in Lion. So what causes this problem?
Firstly, let’s talk the difference between Snow Leopard and Lion? Answer: The Kernel (Nucleus). In SL, the kernel is 32-bit mode when it is in Leo with 64-bit... This is the main problem why Cisco VPN Client won’t work in Mac OS X Lion.
Using Cisco VPN Client for Mac OS X Lion
So, this is the solutions.
Method 1: Boot your Lion into 32-bit mode.
Just turn on your Mac by holding down "3" and "2" button during startup. The core system will start in 32-bit, allowing you to run the Cisco VPN Client!
Note: The next time you reboot you will use 64-bit kernel again, so you need to make this change to be permanent.

Method2: Make the boot mode to be permanent in 32-bit mode.
To select a 32-bit kernel on the current startup disk, use the following command in a terminal:
computer:~ user$ sudo systemsetup -setkernelbootarchitecture i386
Password: <type your password>
setting kernel architecture to: i386
changes to kernel architecture have been saved.
The next reboot the kernel of Mac OS X Lion will be 32-bit and Cisco VPN Client will work well!
Note: These settings are added to the file and will take effect after each boot from this disk:

To return to a 64-bit kernel, the command is:
computer:~ user$ sudo systemsetup -setkernelbootarchitecture x86_64
Password: <type your password>
setting kernel architecture to: x86_64
changes to kernel architecture have been saved.

To determine if your kernel is in 32 or 64 bit:
Open a terminal and type:
computer:~ user$ uname –a

If the response contains "I386", you are in 32 bit:
root:xnu-1699.22.81~1/RELEASE_I386 i386

If the response contains "X86_64", you are in 64 bit:
root:xnu-1699.24.8~1/RELEASE_X86_64 x86_64

That's all. Hope it useful :).
Via crashdump.


  1. My coder is trying to persuade me to move to .
    net from PHP. I have always disliked the idea because of the costs.
    But he's tryiong none the less. I've been
    using WordPress on various websites for about a
    year and am concerned about switching to another platform.

    I have heard very good things about blogengine.
    net. Is there a way I can transfer all my wordpress content into it?
    Any kind of help would be really appreciated!
    My page :: web design miami beach

  2. Have you ever thought about writing an e-book or guest
    authoring on other websites? I have a blog based upon on the same topics you discuss and would really like to have you share some stories/information.
    I know my readers would appreciate your work. If you're even remotely interested, feel free to shoot me an e-mail.
    Feel free to visit my web site ; headphones for sale

  3. This article will help the internet visitors for creating new blog
    or even a blog from start to end.
    Also visit my web page ; svetol canada

  4. You have made some good points there. I checked on the net to find
    out more about the issue and found most individuals will
    go along with your views on this website.
    my site: banned advertisements

  5. Hi! Do you use Twitter? I'd like to follow you if that would be ok. I'm absolutely enjoying your blog and look
    forward to new updates.

    Feel free to surf to my page :: hidemyass