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I use a MacBook Pro (Retina), and using my old MacBook Pro, I can ping my MacBook Pro (Retina) successfully. And I can also ping my MacBook Pro from my MacBook Pro (Retina) successfully (all in the same network).

However, I can’t seem to be able to ping a Macbook Air which is also on the same network (the MacBook Pro’s firewall is configured to not block ICMP and ping requests). Is it because the MacBook Air is configured differently or is it because of something else, and how can I fix this?

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Perhaps the Macbook Air (not the pro) has stealth mode enabled. Quoting from Apple website:

Enabling stealth mode prevents the computer from responding to probing requests. The computer still answers incoming requests for authorized apps. Unexpected requests, such as ICMP (ping) are ignored.

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  • Stealth mode isn't activated either.
    – toggaF
    Commented Mar 1, 2015 at 8:00
  • @toggaF what are the IPs of the respective machines? Maybe they are on different subnets and the router does not allow them to talk to one another (VLANs)?
    – gogoud
    Commented Mar 1, 2015 at 8:04

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