I know it can't be the wifi because as recent as yesterday on Mavericks everything was fine. Now after the update it constantly disconnects and reconnects as much as a few times per five minutes! I've read on Reddit other people are having similar problems. Hopefully Apple fixes this soon.
MacBook Air, OS X Yosemite (10.10)
I haven't installed Yosemite on my iMac or MBA yet but I do find it interesting that some of the Yosemite problems users are having are very similar to the connectivity problems I am having with iOS 8.
Similar behaviour with WPA2 Personal (Airport Extreme + Airport Express extender).
Looking at the Console.app logs, it seems that the machine decides to bounce between two APs:
17/10/2014 19:22:07.000 kernel[0]: ARPT: 36912.641537: MacAuthEvent en0 Auth result for: 20:c9:d0:a7:91:9e MAC AUTH succeeded
17/10/2014 19:22:11.000 kernel[0]: ARPT: 36915.802654: MacAuthEvent en0 Auth result for: 20:c9:d0:af:a3:54 MAC AUTH succeeded
17/10/2014 19:22:14.000 kernel[0]: ARPT: 36918.976595: MacAuthEvent en0 Auth result for: 20:c9:d0:a7:91:9e MAC AUTH succeeded
17/10/2014 19:22:17.000 kernel[0]: ARPT: 36922.166582: MacAuthEvent en0 Auth result for: 10:9a:dd:87:5b:93 MAC AUTH succeeded
17/10/2014 19:22:20.000 kernel[0]: ARPT: 36925.323944: MacAuthEvent en0 Auth result for: 10:9a:dd:87:5b:93 MAC AUTH succeeded
17/10/2014 19:22:20.000 kernel[0]: AirPort: RSN handshake complete on en0
17/10/2014 19:22:20.000 kernel[0]: wl0: Roamed or switched channel, reason #3, bssid 10:9a:dd:87:5b:93, last RSSI -73
17/10/2014 19:22:20.000 kernel[0]: en0: BSSID changed to 10:9a:dd:87:5b:93
17/10/2014 19:22:20.000 kernel[0]: en0::IO80211Interface::postMessage bssid changed
17/10/2014 19:24:01.000 kernel[0]: ARPT: 37026.789184: MacAuthEvent en0 Auth result for: 20:c9:d0:af:a3:54 MAC AUTH succeeded
17/10/2014 19:24:05.000 kernel[0]: ARPT: 37029.979376: MacAuthEvent en0 Auth result for: 20:c9:d0:af:a3:54 MAC AUTH succeeded
17/10/2014 19:24:05.000 kernel[0]: AirPort: RSN handshake complete on en0
17/10/2014 19:24:05.000 kernel[0]: wl0: Roamed or switched channel, reason #3, bssid 20:c9:d0:af:a3:54, last RSSI -65
17/10/2014 19:24:05.000 kernel[0]: en0: BSSID changed to 20:c9:d0:af:a3:54
17/10/2014 19:24:05.000 kernel[0]: en0::IO80211Interface::postMessage bssid changed
17/10/2014 19:27:06.000 kernel[0]: ARPT: 37210.896826: MacAuthEvent en0 Auth result for: 20:c9:d0:a7:91:9e MAC AUTH succeeded
17/10/2014 19:27:09.000 kernel[0]: ARPT: 37214.088570: MacAuthEvent en0 Auth result for: 20:c9:d0:af:a3:54 MAC AUTH succeeded
17/10/2014 19:27:12.000 kernel[0]: ARPT: 37217.263429: MacAuthEvent en0 Auth result for: 20:c9:d0:a7:91:9e MAC AUTH succeeded
17/10/2014 19:27:15.000 kernel[0]: ARPT: 37220.429042: MacAuthEvent en0 Auth result for: 10:9a:dd:87:5b:93 MAC AUTH succeeded
17/10/2014 19:27:18.000 kernel[0]: ARPT: 37223.509291: MacAuthEvent en0 Auth result for: 10:9a:dd:87:5b:93 MAC AUTH succeeded
17/10/2014 19:27:18.000 kernel[0]: AirPort: RSN handshake complete on en0
17/10/2014 19:27:18.000 kernel[0]: wl0: Roamed or switched channel, reason #3, bssid 10:9a:dd:87:5b:93, last RSSI -76
17/10/2014 19:27:18.000 kernel[0]: en0: BSSID changed to 10:9a:dd:87:5b:93
17/10/2014 19:27:18.000 kernel[0]: en0::IO80211Interface::postMessage bssid changed
Same problem on my iPhone 5S iOS 8. WPA2 Enterprise alone repeatedly disconnects (usually in sleep) and reconnects (when unlocked). WPA2 Personal stays connected permanently.
Constant disconnecting and reconnecting with WPA2 enterprise wifi. Any available solution?
