Q: Did anybody encounter WiFi Connectivity issues after this download?

I am experiencing the exact same problem. At first it appeared that my iPhone and Roku were effected so I thought something was wrong with my Airport. Called apple support, couldn't find anything wrong. Called cable provider, can't find anything wrong with cable box. Roku and iPhone seem to be working now three days later. Laptop is not working properly. ????

Can you guys check if the new Photos app is eating all the bandwidth ? Try pausing the upload activity for a day and check if it helps.

Can you guys ping your router and update that here ? Could help explain if this is a wireless issue or not.

I do not have Photos app running so I suppose is not the problem. I am executing the ping throughout Terminal app but, from time to time, connections drops again... Any more ideas?

Hi,

I experienced the same issue after I downloaded the latest version.

Can you try to forget the connection and connect again with the password?

Probably they changed something in the security side and the previous settings the computer remembers are different from the new one. It worked for me.

Wi-Fi Problems in OS X Yosemite (2)

Wi-Fi Problems in OS X Yosemite (3)

WiFi Potential Temporary fix - Yosemite

Also try turning off Bluetooth.

WIFI AND BLUETOOTH FINALLY SOLVED, NO REALLY - YOSEMITE 10.10