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

I tried to share my Internet connection with another Mac but it failed. I could before I upgraded to Mountain Lion.

I have a 3G USB modem that I use for Internet. I went to System PreferencesSharingInternet Sharing → Select my 3G device from Share your connection from → Tick WI-FI → Setup WI-FI Options... and then enable Internet sharing.

However, the other Mac can see my network but cannot join.

How do I fix this?

HW: MacBook Pro Retina 15"
OS: Mountain Lion

enter image description here

share|improve this question
How near are the machines - the graphic shows that the WiFi signal is too weak, the arcs turn black showing signal strength – Mark Oct 19 '12 at 14:22

You could try disabling your Wi-Fi, changing the sharing settings so that the security is off (just for testing purposes of course) then enabling your Wi-Fi and try again.

share|improve this answer

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.