Macbook Pro Slow wi-fi connection

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Please detail all you have done to resolve your issue. Need this information so that the users can avoid the "been there, done that" scenario type responses. This is to avoid repeating the troubleshooting you may have already tried. Thank you.

Changing your router number most time works & it's all you have to do.

System Preferences>Network

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

Manually provided DNS server addresses are higher priority than DHCP's

http://support.apple.com/kb/HT1714 Solutions for connecting to the Internet, setting up a small network, and troubleshooting

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Also, run the Airport Utility app which is located inside the Utilities folder.

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If using a Linksys router, contact LinkSys Customer Support and/or post in their forums.

If using Apple's Airport, please re-post over in one of the AirPort Forums.

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:

com.apple.airport.preferences.plist

NetworkInterfaces.plist

preferences.plist

com.apple.nat.plist

You will have to re-configure all your network settings since deleting

dlink router

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 had the same issue and I fixed it. Documented my process here:

http://www.s0hel.com/blog/401/fixed-slow-wifi-issue-with-new-macbook-pro/

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.

This procedure hasn't fixed my problem. All wifi range canals have the same transfert rate for me. On wifi g or n ... this is the same thing. At 2 or 3 meters of the home router : OK...145 Mbits/s ....but at 10 meters.... just 13 Mbits/s without nothing between the router and my MBPro...