Q: Wifi problem since 10.11.2

I haven't had any problems with my WiFi since updating, but I'm sorry to hear that you are.  What steps have you taken on your end to fix this?  Have you reset your modem/router?  Have you contacted your ISP? 

I too have the same exact problem. I even own this exact MBA model - Mid 2013. Used to have same problem on one of the betas of the initial El Capitan beta release, but it was quickly fixed.

But after upgrading to 10.11.2 my Wi-Fi connection at work keep reconnecting every couple of minutes. I've noticed it happens when opening too many links/apps at once. Wi-Fi at home works fine though (i have a Time Capsule), but it's just impossible to use my MBA at work now.

Tried EVERYTHING - reseting SCM/NVRAM, deleting config files, creating new network location, using 8.8.8.8 DNS and custom MTU, booting in safe mode, cleaning caches, etc. No luck. Even did a clean install of El Capitan (unfortunately, turns out it installs OS with the latest update) and restoring backup from Time Machine - the bug still exist.

I'm reluctant to do the clean install without restoring - it *****, because I will have to setup all the apps and accounts from the scratch, but i guess it is inevitable.  Though something tells me this is a hardware/software combo bug and we have to wait for 10.11.3 to fix it.

Does anyone know - can I install 10.11.1 manually and then restore from the backup I have on Time Capsule? Or there are some changes already in backup that will require me to have 10.11.2?

Or does someone encounter the same bug and have a fix?

Excuse me for my English, not a native speaker

It's happening to me and it's every 10 seconds or so... can't work like this.

Mine is MacBook Pro (Retina, 15-inch, Late 2013)

The update is suppose to Fix Wifi not to break it.

One thing you could check, when you delete your "Network Name" from within System Preferences/Network under the advanced button make sure you click "apply" when leaving - then open up Keychain Access and look to see if your network has actually been removed - if not select and delete. You should have had two which are normally in Local Items and System Keychains respectively. Donot create a fresh network yet but instead reboot, when you have logged in create a new network by looking for your WiFi and selecting making sure you choose any options regarding remembering/save in Keychains if available (can't remember what shows up from memory).

Tried this now. No luck.  But I was able to pinpoint the exact moment connection was dropped wile looking at console

Here's a log. It happened on 16:35:33. Does anyone have any idea?

ec 15 16:35:21 Zomer com.apple.WebKit.WebContent[560]: [16:35:21.262] FigAgglomeratorSetObjectForKey signalled err=-16020 (kFigStringConformerError_ParamErr) (NULL key) at /Library/Caches/com.apple.xbs/Sources/CoreMedia/CoreMedia-1731.15.33/Prototypes /LegibleOutput/FigAgglomerator.c line 92

Dec 15 16:35:26 Zomer com.apple.xpc.launchd[1] (com.apple.WebKit.Networking.0EAD4F7E-1130-4788-A311-EA01B3DA1057[593]): Service exited with abnormal code: 1

Dec 15 16:35:27 Zomer secd[255]:  __SOSCCProcessSyncWithAllPeers_Server_block_invoke sync with all peers failed: Error Domain=com.apple.security.sos.error Code=1032 "peer: EsfyMxdOWxDma3NzkFKW+xHI7y not found" UserInfo={NSDescription=peer: EsfyMxdOWxDma3NzkFKW+xHI7y not found}

Dec 15 16:35:27 Zomer CloudKeychainProxy[362]:  __39-[UbiqitousKVSProxy doSyncWithAllPeers]_block_invoke_2 <UBK-s-pC---> syncWithAllPeers (null), rescheduling timer

Dec 15 16:35:30 Zomer com.apple.xpc.launchd[1] (com.apple.WebKit.Networking.949528F1-D5F3-4B52-B3FA-EFE24626DE10[600]): Service exited with abnormal code: 1

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 189.798725: wlc_dump_aggfifo:

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 189.798753: framerdy 0x0 bmccmd 1 framecnt 1024

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 189.798786: AQM agg params 0xfef maxlen hi/lo 0x0 0xcdf8 minlen 0x28 adjlen 0x8

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 189.798829: AQM agg results 0x8b17 len hi/lo: 0x0 0x14da BAbitmap(0-3) 0 0 0 0

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 190.053086: wl0: fatal error, reinitializing, total count of reinit's[1], @'wlc_bmac_report_fatal_errors':18076

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 190.106475: wlc_dump_aggfifo:

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 190.106541: framerdy 0x0 bmccmd 1 framecnt 1024

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 190.106574: AQM agg params 0xfef maxlen hi/lo 0x0 0xcdf8 minlen 0x28 adjlen 0x8

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 190.106618: AQM agg results 0x8b17 len hi/lo: 0x0 0x14da BAbitmap(0-3) 0 0 0 0

Dec 15 16:35:33 Zomer kernel[0]: IO80211AWDLPeerManager::reset state 0

Dec 15 16:35:33 Zomer kernel[0]: AirPort: Link Down on en0. Reason 8 (Disassociated because station leaving).

Dec 15 16:35:33 Zomer kernel[0]: en0::IO80211Interface::postMessage bssid changed

Dec 15 16:35:33 Zomer kernel[0]: IO80211AWDLPeerManager::interfaceStateChange WD reset in progress, not enabling AWDL yet! Interface

Dec 15 16:35:33 Zomer kernel[0]: IO80211AWDLPeerManager::setAwdlElectionMetric can't set election metric (60) ret=6

Dec 15 16:35:33 Zomer kernel[0]: ARPT: 190.173139: AirPort_Brcm43xx::syncPowerState: WWEN[disabled]

Dec 15 16:35:33 Zomer symptomsd[193]: -[NetworkAnalyticsEngine _writeJournalRecord:fromCellFingerprint:key:atLOI:ofKind:lqm:isFaulty:] Hashing of the primary key failed. Dropping the journal record.

Dec 15 16:35:33 Zomer com.apple.WebKit.Networking[519]: tcp_connection_destination_perform_socket_connect 350 connectx to 216.137.61.124:80@0 failed: [50] Network is down

Dec 15 16:35:33 Zomer com.apple.WebKit.Networking[519]: tcp_connection_destination_perform_socket_connect 350 connectx to 216.137.61.134:80@0 failed: [50] Network is down

Sorry, that was my only thought, from your console log extract may be some higher level types might be able to offer some advice - Link is usually helpful in these situations.

Look like the driver crashes, so system reinitializes it and reconnects. This is so frustrating

I' ve tried everything, my only solution was back to Mavericks and problem solve.

Before read your post, I was wondering if really the update to 10.11.2 will fix wifi problems like they promise, but now i see that they don't.

So i decided to stay with my Wifi working in Mavericks.

I have a Mac Mini Late 2012

The funniest this is that Wi-Fi was working fine for me! And they "fixed" this with 10.11.2 update.

Isn't anybody from Apple monitoring this forum go give an answer?

Does anybody tried SMC reset?

https://support.apple.com/en-in/HT201295