Mac OS X Yosemite connectivity issue Every so often my MacBook Pro starts getting very intermittent network connectivity. I have a Virgin Media SuperHub.

Pinging my router gives me lots of request timeouts:

64 bytes from 192.168.0.1: icmp_seq=2438 ttl=64 time=2.000 ms
64 bytes from 192.168.0.1: icmp_seq=2439 ttl=64 time=33.810 ms
Request timeout for icmp_seq 67976
Request timeout for icmp_seq 67977
Request timeout for icmp_seq 67978
Request timeout for icmp_seq 67979
64 bytes from 192.168.0.1: icmp_seq=2444 ttl=64 time=1.568 ms
64 bytes from 192.168.0.1: icmp_seq=2445 ttl=64 time=1.633 ms


Sometimes the timeouts last only a few pings sometimes many.

Through experimentation I've found that flushing the arp cache using

sudo arp -a -d


Immediately max ping start working but then after a bit the timeouts come back. I've confirmed this by doing:

sudo watch -n 1 arp -a -d 


And the ping timeouts disappear and I can browse without any slowness as long as I leave that running.

Rebooting the computer also clears this problem for a while but it comes back.

I need a permanent fix for this.
Try this:

http://www.macstadium.com/blog/osx-10-9-mavericks-bugs/

Even if supposedly only applies to Maverick, I found a Macbook with Yosemite having the same problems and the fix seemed to work. Worth a try.