Changing your router number most time works & it's all you have to do.
Click the Assist Me button.
In the next window that pops up, click the Diagnostic button & do the necessary.
See KB Articles: http://support.apple.com/kb/HT1401 AirPort troubleshooting guide
http://support.apple.com/kb/HT2712 Using network locations in Mac OS X
http://support.apple.com/kb/HT1714 Solutions for connecting to the Internet, setting up a small network, and troubleshooting
Also, run the Airport Utility app which is located inside the Utilities folder.
If using Apple's Airport, please re-post over in one of the AirPort Forums.
im using a dlink router.. but in my windows laptop wifi works fine.. with the speed that i have, and i check it in speedtest.. but here is like 1/7 my speed.. its annoying .. ive done the things that you said, but when i click on "assisst" then select the wifi network, and then i need to wait like 3 minutes, said that the setting changed and i need to put my password of the wireless network, i write my password, and then it says that i cant connect cause my username or password is wrong... after waiting like 5 minutes... and i can connect normaly ( slow speed ) but with the assisstant it says error .... i dont know what to do ....
setting changed and i need to put my password of the wireless network,
A Fix for "Your network preferences have been changed by another application" Error
In the Library/Preferences/SystemConfiguration/ folder delete the following:
You will have to re-configure all your network settings since deleting
Read Dlink's user manual and/or visit their customer tech support website.
Hey mate! I have the same problem as you!!
I recieved my non retina macbook pro 2012 today! like 10 hours ago and wifi speeds are insanely horrible!
I have an older sony vaio next to me on the same table, on the same wifi and modem it will get 2 - 2.5x the download speed of the macbook.
I can run a speedtest and get 11mbit/s on the sony and the macbook will get 6mbit/s
Thats with the modem only 2m away!
when the modem is in a different room the sony still gets 9-10 mbit/s and the macbook drops to between 1.5 and 4mbit /s !!
AAARRRGGHH!! I feel your pain.
Same issue thomas. I have my Retina Macbook Pro sitting next to my 2008 Macbook and the retina is getting half the wifi download speed. Took it to Apple Genius Bar and wifi card seemed to be operating at a good capacity so they told me to call Apple Support when I was home. It may be a Airport or Router issue. No resolution for me yet.
I found this thread helpful (forget the PRAM stuff): https://discussions.apple.com/thread/2638879?start=0&tstart=0
Try turning off bluetooth and see if that makes a difference. If so it may help to change the channel on your Airport or Router. Changed mine to channel 10 and it works.
I have the same problem. Wifi slow on LION. I have a new MBP 2.2 Ghz of May 2012. Connection speed OK on PC windows and OK on a Snow Leopard Mac Book Pro. I have called to apple support and they will send me an "transporter" like UPS to take my MBP to analyze the problem. It is not an hardware problem because OK on Snow leopard but not ok on lion. I think that Mountain Lion will not fixe the problem of slowness.