Late 2011 model, A1278 / 2.4 GHz i5 or 2.8 GHz i7 processor.

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wifi connections drops by itself or no connection...:(

I use os x mountain lion os v10.8.4

When i connect to the wifi n/w

normally, there is a message

'could not connect "dlink" connection timed out.'

dlink=name of my home wifi n/w

Can anybody help how to troubleshoot this issue

Answered! View the answer I have this problem too

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First is your WiFi Access Point (AP) dlink the only dlink listed in the pull down listing? If you live in a densely populated area your AP's name is not unique enough. You should alter it like Fidos'_Den, Cats'_Lair, The_Fish_Tank, or what you can think of that does not directly ID you (basic security).

If you can't even see the AP list or can't see your AP name at all your WiFi network is not working, no listing in your menu your MacBook's AirPort card is bad. Or, your WiFi Router's WiFi circuit is bad if you don't see its name but you see other AP's (when your physically near it). If you don't see it at one location Vs another then you'll need to move the antenna or the router closer to that direction (more central in your house). Try resetting the Router and think about putting it on a surge suppressor or better yet a small UPS.

OK, you've changed the name and sometimes you can see it, other times not, so we know your system and the router are working. What's causing your WiFi to be unstable? Again, other people! in this case your AP's frequency has too much noise of other AP's around it. You'll need to change out the channel its using or better yet move to the 5GHz frequency (802.11n). You'll need to upgrade your AirCard and may need to upgrade your Router as well it you go to 5GHz (802.11n).

Lastly, you can use a monitoring apps to see what AP's are running around you and there channel/frequencies. Here's one on the App Store I use WiFi Explorer.

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Dan,

Sorry to reply too late,

i was out of the state for a week

i'll try the above steps and i'll be back ASAP with the results

But the wifi n/w works perfectly fine for all my other devices(iPhone,samsung galaxy,and sony vaio laptop)

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No problem. If other devices are stable and are near where you use your MBP then you could have a loose or bad connection with the internal WiFi antenna in your MBP. If on the other hand the location you use your MBP is not near the other working devices then its possible to the signal is on the weak side. Try moving the AP nearer to the center of your house.

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I worked on the above steps

and i am running my machine with all the updates

Wifi has now started to work

BUT

issue is that is that it works only when i am in a 3-5m radius from the wifi connection

i dont know wheather this is an issue of the router or the wifi antenna in my MBP

Nevertheless,thank you so much if you can further help me in increasing the range,i shall be highly thankful to you.

:)

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Good to hear its' working at least. Do you have access to a second AP (friends house?), If you do try accessing it to see if it's the MBP or if your AP is the problem. It sounds like your antenna it bad on either the MBP or the AP unit. Also did you download the WiFi Explorer app. It will tell you the signal strength which can help you here in figuring out which needs service.

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Wifi connection unstable in MacBook. This problem are face many of MacBook User. Apple provide that solutions using update the software . In details please look ........

Fix MacBook Wifi unstable connection

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I have over 30 MB Airs in use here and I have yet to see this problem. Thats not to say you might be one of the lucky ones ;-} that have this issue. Sure, make sure you've updated your OS to remove it as a concern.

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FYI - Here's the patch Jack MacBook Air (Mid 2013) Software Update 1.0. Note Navjot's MB air is a late '11 model so this update won't help him.

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Navjot will be eternally grateful.
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