In the past few days, my 2011-model iMac with Yosemite 10.10.2 has started dropping wireless connection, yet it doesn't seem to be aware.
I'll be using the computer, and notice a sudden loss of internet connection. The WiFi status indicator on the toolbar hasn't changed, holding option while clicking shows that it thinks it's fully connected, shows the signal strength info I would expect, says the internet is "reachable", etc.
However, pinging any domain/IP fails, and even pinging the router itself fails. Turning off the iMac WiFi and back on works - but only lasts until the next disconnect.
As far as I can tell, it's not the router. I have a PC, other Macs, and iPad/iPhone devices and they have no trouble.
I can't say for sure, but this didn't begin until after our area experienced a power outage and my iMac was cut off from power.
A week ago I installed a new Linksys WRT AC1900 router because I needed to solve signal strength and other issues with my last router. For the first several days I had no trouble.
I have two questions:
- Does anyone know what might even cause this?
- How can I better debug the issue?
Here's a picture of the alt+click of the wifi menu when I notice the internet has suddenly dropped:
And here's a picture of the same menu after I've reconnected and have internet access:
While unreachable, I also cannot ping the router itself:
PING 126.96.36.199 (188.8.131.52): 56 data bytes Request timeout for icmp_seq 0 Request timeout for icmp_seq 1
And the same ping while the connection is back:
PING 184.108.40.206 (220.127.116.11): 56 data bytes 64 bytes from 18.104.22.168: icmp_seq=0 ttl=64 time=1.224 ms 64 bytes from 22.214.171.124: icmp_seq=1 ttl=64 time=1.064 ms 64 bytes from 126.96.36.199: icmp_seq=2 ttl=64 time=0.959 ms 64 bytes from 188.8.131.52: icmp_seq=3 ttl=64 time=0.940 ms