I have a Mid-2013 MacBook Air that has been acting up lately. I initially started seeing issues with ridiculous jitter(100s of ms) half a year ago, but since I do not game a lot, I ignored them. However, for the past few months, I've started seeing more and more degraded WiFi performance on my Air.
For instance, if I run speedtests within seconds of each other(after the first one has completed) on my Mac and on my phone, I get ~3x higher ping, 4x slower download, and about the same or better upload speeds(which I think is a limitation with my phone).
I have tried doing an SMC reset, deleting the following files:
/Library/Preferences/SystemConfiguration/ directory, as was suggested by a guide named
Fix Wi-Fi Problems in OS X Yosemite on osxdaily. None of these showed any improvement for me. I have a Thunderbolt to Ethernet adapter, and when I use that, I see the speeds like they should be.
I suspect this is some issue with my wireless card, unless its a problem with OS X itself, which is kinda likely given that I am using
10.11 Beta (15A215h), but the issue has been present even before I upgraded to the Beta OS. Does anyone have any ideas of what the issue could be, and how I could resolve it myself?
Clients are an average of 4, sometimes more, sometimes less
Also, I've tried with different routers, with only my Air connected, and I ALWAYS see the performance degradation, no matter what network I connect to.