Can't connect MacBook to a WPA

I go to this coffee house to study, and they have a wireless router that is a WPA network. When I connect to it, my connection only works about 20% of the time. I can surf the internet for maybe 2 minutes and then it wont work for seven. Then it will start working again. Then it will work, but take FOREVER to load webpages. (I'm talking several minutes)
Any ideas?

Are you having trouble connecting to WPA on your home router, or any trouble connecting to any other wireless access points in libraries, other coffee shops, etc?
If you only have trouble at this one place, then it's probably not your problem, it's something on their end. If you see any other Mac users in the same coffee shop, ask them if they have trouble, again this is to try to narrow down exactly where the problem is. Because on the surface, it should just work. If all Mac users have trouble in that place, it's a problem with the router. If you're the only Mac user with this problem, the problem is on your Mac.
If you have trouble everywhere, you should check your network settings.
Basically this is a question about what "process of elimination" troubleshooting have you already tried.

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I have a MacBook which connects happily to my home Airport Express wireless-G network. However, my parents have an Airport Express which is a year or two newer, and theirs is wireless-N. I have searched the discussion pages here for guidance on why I can't connect to their network. My MacBook sees the N network, I have the password, but it just won't connect. At first I thought my MacBook was not compatible with N, but these discussion pages seem to say that mine should have the capability. I found something about downloading a $2 "wireless N updater enabler" software from Apple, which I did, but it wouldn't install, perhaps because my OS is already up to date? (I think the enabler update was more for OS 10.4 users?)
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Hello Alley-cat,
Thank you for using Apple Support Communities!
I found an article to assist with troubleshooting external displays connected to your mac that should prove helpful.
Named Apple computers: Troubleshooting issues with video on internal or external displays you can find it here http://support.apple.com/kb/ht1573.
No video or no signal, image distortion, "snow," or flickering
Check connections
When using an external display be sure to check the following:
If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
Monitor and Display Adapter Table
About Mini DisplayPort to HDMI adapters
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
Thunderbolt ports and displays: Frequently asked questions (FAQ)
Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
Try unplugging the video adapter or cable and then plug it back in.
If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).
Reset the system
You can reset the Mac's parameter RAM and SMC.Reset the resolutionStart by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displays from the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.
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connect the computers through the router via ethernet
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Message was edited by: Grant Bennet-Alder

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Hi,
I can't connect my Macbook to my PC, although the internet works on my Macbook and I can access it just fine from the network. I've tried smb and it didn't work, what can I try next?
Thanks

Hi chim:
Welcome to Apple Discussions.
I assume you are connecting the two computer through a router. Try installing Bonjour for Windows on your XP, and make sure you have the proper file sharing active and drives shared on the Windows Machine.
http://www.apple.com/support/downloads/bonjourforwindows103.html
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http://docs.info.apple.com/article.html?artnum=301514

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bcassid
Do me a favor. So many users are experiencing this (no myself though) and I have suggested so many things with nothing constantly working. There are successes here and there, but nothing consistently solves the problem. However, try the following in Airport Utility and both Macs, and then let us know what happens.
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208.67.222.222
208.67.220.220
Click "Update".
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Your question asked.....
Can either of these three connect to the existing router (which is not an Apple router and cannot be changed) wireless?
So we understood that you wanted to connect to the existing router using wireless.
If you can run an Ethernet cable from one of the LAN <-> ports on your existing router to the other house, then you could connect one of the Apple routers that way.
Compare the Apple routers here to find one that might meet your requirements:
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Pardon, for some unknown reason, i was thinking of Ethernet to mini display adapter
Apples are 3rd party on the HDMI to MDP adapter and are $35
http://store.apple.com/us/product/HA824ZM/A/belkin-mini-displayport-to-hdmi-adap ter
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Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573
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Cannot get new MacBook Pro to connect reliably to wifi at home. All other devices connecting in same location in house with no problem at all so have eliminated problems with physical location of router, which is also relatively new. Tried to run network diagnostics but refuses to run when problem occurs. Restarting router clears problem but it reoccurs within ten minutes, also, restarting MacBook clears it but then reoccurs in ten minutes.
***now 4th attempt as boards keep rejecting this message.

Just in case anyone comes by this thread looking for answers, I found out what the problem was: channel interference on my Virginmedia router. The day after I took my macbook to be checked out all my other devices started to have similar problems and after a crash self-taught cause in wifi network technology I changed the channel my router was operating on from one which was very crowded to one which has very little competition on it. Problem solved for all remaining devices, then the macbook came home and has worked like a dream ever since.
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which shows you which channels all your local users are using so you can pick a quieter spot on the airwaves - I found some good instructions for how to do this on the Virginmedia website, but you would have to find how your router works.
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Hi,
I just received my new Macbook Pro 13" since my old MBP from 2010 was stolen.
I'm trying to connect it with my new led-tv Samsung ue46d8005.
I have a mini-display to hdmi adapter and from there a hdmi cable hooked up to the tv. But no matter how I do the tv or the MBP doesn't recognize each other. I have scrolled through the entire internet for a solution and tried several tips from people.
The adapter and hdmi cable worked just fine with my old MBP and panasonic tv so there's nothing wrong with it.
I've tried all the four different HDMI inputs.
I've tried to rename the "label" of the HDMI to PC/DVI.
I've tried to shut down the tv and MBP, and then start them up at the same time.
But there's no luck with anything!
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The mirror setting appears in the 'Arrangement' tab in the Displays preference pane once the two devices are communicating, so the Samsung support person was not being particularly helpful. Besides, I would recommend against using mirroring as it forces the TV to operate at the resolution of the MBP and not at it's native resolution thereby compromising image quality. Extended desktop mode with an external display ensures that the TV will use its full native resolution of 1080p (or 1920x1080) and also gives you the flexibility of having two screens with different applications visible on each.
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http://support.apple.com/kb/HT1379?viewlocale=en_US&locale=en_US
http://support.apple.com/kb/HT3964

Can't connect MacBook to a WPA

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