Q: OSX Yosemite Wifi issues

I keep getting messages saying Safari cannot connect because it cannot establish a secure connection.  Everything is slow, particularly Youtube and Facebook (Facebook is practically inoperable).  Apple you're letting us down.

I created a new network location and deleted Bluetooth DUN.  Have not had any problems since.

(MacBook Pro 13-inch, Mid 2012 Mac 10.10 Yosemite)

I started getting the issues only after the latest update this week.

Option+click on the Wifi icon and it shows 7Mbps connection to my wireless ac router.

This is a Netgear Nighthawk (so its not old kit) with latest firmware. Never saw this before the latest Yosemite update. My Yosemite was a clean install a few weeks ago.

I had crappy wifi with 10.10, then updated to 10.10.1 and lost wifi completely after a couple of days. But after half a day of troubleshooting, below is exactly what I did to get it to work! In other words, as the previous user im_if did, I created a new location in System Preferences > Network and deleted the old one.

System Preferences > Network > Location > Edit Locations... > [gear icon] > Rename Location > [I just called it 'corrupt'] > + (New location) > [I called it 'Automatic' to replace what was there] > - (delete location) > [deleted 'corrupt' location I just created] > Advanced > Renew DHCP Lease.

This worked for me as well, provided I also used the little cog to re-order the system preferences so the wifi network was first and bluetooth dun was last.  (Another tweak which seems to have made this solve stable since the last Yosemite update was to change my ipv6 in the advanced setting of network preferences to local)

I am having the same problem. After upgrading to Yosemite from Maverick I am having internet problems. All programs that use the internet through wifi hang up after a couple of hours. I work on my Macbook Pro Retina all day and this is getting really frustrating. I have to restart every time it hangs up to clear what ever is going on, after a few hours it does it again. Seems like a memory thing but only happens when wifi is on. I did figure out if I don’t launch Mail it doesn't hang up. I have tried all the tips and none work for me. It’s something to do with Mail because internet/Safari/programs stay stable when Mail is not launched. Very weird and I don’t have time to trouble shoot this, It’s a busy season now and taking away from my work time. Very frustrating! Time is money!  It could take days to figure it out it. APPLE please get that update out.

Well, it's too late. I'm done with it because is pointless and hopeless. I did fix my problem and shared information on this forum. For those of you waiting for Apple to address it through an update will be a long wait. Unless some of you talented software professionals try a little harder and show Apple how to fix their own program. The problem is buried deep in the software structure. No fixes other then Apple's action on either; making it possible for people to officially revert to Maverick or correcting the way Yosemite communicates with so many different networks. Good luck to all of you.

Hey everyone, after visiting the genius bar for the fourth time, Apparently routers with WPA security have been found to drop out regularly with the Yosemite update. If you change your routers security to WPA2 an apple staff member claimed that it would stop wifi dropping out. I corrected my routers security, and had success at first, though after restarting my Macbook pro 15" early 2011, the wifi won't even turn on. I use a Linksys router, and instructions on how to edit security setting on their website are pretty straightforward and really easy to follow. Just posting this in case it helps some people.

^I've tried the keychain fix too, didn't help.

I'm going in for my fifth appointment this afternoon with apple, going to start asking them for petrol money haha

Been on WPA2 since the get go... Unfortunately this does not alleviate the issue anymore than any of the other temp. fixes ;-)

At least over here.

I just realized Apple came out with a new update Two days ago  10.10.1  .... I just installed it.  It’s been an hour since installed, so far so good. We shall see...keeping my fingers crossed. It fixed that annoying problem with Message Agent and Cloud asking for keychain access every time I restarted. That’s fixed. I Hope the wifi is fixed now. so far so good.

My wifi issue after I upgraded to Yosemite seems somewhat unique.  When wifi is turned on on my MacBook Pro Mid 2009 my network slows down, meaning every device connected to my network has a slow connection.  I am getting speeds no faster than .4-1.5 Mbps for any device connected to my network when wifi on my MBP is turned on.  As soon as I turn off wifi on my MBP, my speeds return to normal on my other devices (2 iPad Airs, iPhone 5, iPhone 6, and wife's MBP Mid '09 running Snow Leopard).  The "fixes" I have tried with no success are:

1.) Restarting MBP and router (Time Capsule) multiple times

2.) Restarting modem multiple times

3.) Upgrading to 10.10.1

4.) Turning off Bluetooth

5.) Deleting iPhone from Bluetooth (I read where that worked for someone else)

6.) Deleting files in the folder and then eventually deleting whole folder Macintosh HD/Library/Preferences/SystemConfiguration

7.) Reset System Management Controller

8.) PRAM reset

9.) Deleting and creating a new network location, mentioned a few posts above

10.) Turning off Handoff on my iOS devices (handoff is not supported on my MBP)

I'm sure there are other things I have tried that I am forgetting.  None of these have worked at all.  The only way to get my network back to normal performance is to turn the wifi on my MBP off rendering it useless.  Any other ideas for a fix?

It sounds like your router might be misconfigured. I did a quick search for you.  Check out this link. Hope it helps

MacBook Pro slows down my entire network!

Sorry to bother but what planet are you on? You "answer" is the most stupid thing I've ever read in a long time on this forum.

I fixed it by ordering a new PC with Windows 8.1

Apple either cannot fix this, or will not fix it. They won't even admit it's happening. I've purchased a Macbook Pro annually for years, but now I am done. Nothing personal, Apple, but if ANY company bungled something this bad and didn't fess up or fix it, I'm out.

It is sad to see that Apple's level of narcissism has reached the point of self destruction. So long, and thanks for all the dmg's

my MBPr is pretty much a fancy calculator now.