Q: MacbookPro Wifi got disconnected and then connected again for many times
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Sep 2, 2014 6:57 AMby jason269,HelpfulHello, Chen.
Thank you for visiting Apple Support Communities.
I see you are experiencing an issue with internet connectivity. Here are a couple potential solutions that I would recommend going through.
Note: The screenshots and specific menu choices in this article apply to OS X Lion v10.7 and later. The concepts are the same for Mac OS X v10.6 Snow Leopard, except AirPort appears instead of Wi-Fi in places such as the Network pane of System Preferences.
Preparation
First, determine what the issue is. Knowing what's wrong will help you identify appropriate troubleshooting steps.
- Does the symptom occur with more than one Wi-Fi device?
- Wi-Fi issues may be related to the network in question or they may be related to the Wi-Fi computer joining that network. Usually, if other computers or devices (such as the Apple TV or iPhone) are able to get on the Internet without issues, then your Wi-Fi router is probably fine.
- If you only have one Wi-Fi device, proceed with this article.
- Make sure your software is up-to-date.
- Install all software updates available for your Mac.
- If you use a third-party Wi-Fi router, check with the manufacturer to confirm that it has the latest firmware installed. If an update is available, follow the manufacturer's instructions for updating the firmware.
- To determine if your Apple Wi-Fi base station firmware is up-to-date, see Updating your software.
- Check your connections.
- Some networking issues may be caused by loose or disconnected cables. Verify that all Ethernet and power cables connected between your modem and your Wi-Fi router are correct. Checking that devices such as your router and modem are on, disconnecting and carefully reconnecting Ethernet cables, and/or replacing damaged Ethernet cables may resolve the issue without any further troubleshooting.
- Verify that you are using the recommended settings for your device.
- Restart your network devices.
- Powering your modem or router off for a few seconds and then on again may resolve network issues without any additional troubleshooting. If you have phone service through your ISP, power cycling your modem may interrupt that service. You may need to contact your ISP in order to restore your phone service if your modem is reset or powered off. Ensure that you have alternative means to contact your ISP (such as a cell phone) to avoid unnecessary delays in restoring your Internet or phone service.
Symptom: The network connection drops unexpectedly
- Your Mac may not not stay connected to your Wi-Fi network reliably.
- Your Mac may stop accessing the Internet during use.
Solution
Use these steps if your computer disconnects from its Wi-Fi network unexpectedly.
- Check your range to the Wi-Fi router and reduce the effect of interference.If your computer is too far from your Wi-Fi router or your environment has too much Wi-Fi interference, then your computer may not detect the Wi-Fi network properly. The easiest way to check for range limits with your Wi-Fi network is to move your computer or your Wi-Fi router closer together and make sure that there are no obstructions (such as walls, cabinets, and so forth) between the router and your computer.See Potential sources of wireless interference for more information about interference and solutions.
- Try connecting to a different Wi-Fi network. If your computer works fine when connected to a different Wi-Fi network, then the issue may be related to your network router or ISP. In that case, contact the manufacturer of your router or your ISP.
You may also have to try the steps in the section labeled Symptom: After restarting or waking from sleep, my computer might not connect to the Internet.
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/HT4628
Cheers,
Jason H.
- Does the symptom occur with more than one Wi-Fi device?
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Sep 2, 2014 11:19 PMby ITTransactionSoftwareChief,I am a new MacBook Pro user and have the same Wi-Fi problems.
The problem happens every where I go. I've tested it at my home and my father's home. Both are the same.
At home the Wi-Fi router/gateway is about 10 feet away. I get substantial improvement in overall performance with ethernet on a CAT-6 than I do on 802.11n direct to a Wi-Fi router.
The MacBook Pro Wireless Diagnostics throw a number of errors and repeats them over and over and over.
1. "Conflicting Country Codes" from Security Type Scan
2. "Crowded Wi-Fi" Channel"
3. "Incorrect Network Location"
4. "Misconfigured Network Settings"
5. "Preferred Network Mismatch"
6. "Misconfigured Web Proxy"
7. "DHCP Disabled Sender"
These messages repeat and repeat and repeat. Meanwhile the event log clearly shows that this is mistaken.
1. "Attempting to connect to <SSID>, already connected . . . bailing"
I've double checked Apple's suggested Wi-Fi settings for the MacBook and the Router. They are identical.
Meanwhile the Wi-Fi adapter has opened a huge number of "streaming" UDP sockets which I would like to close since I do no streaming I/O. The system console shows errors with Wi-Fi applications trying to use a zero (0) index to access an internal array. i.e. a misguided pointer or a memory leak.
Remember this is based on a UNIX O/S, invented over 30 years ago by Bell Labs for testing digital switches. I got to see an original printout of the O/S source code listing. It was 15,000 lines of code; 5,000 of them were the same . . . "STOP." UNIX was never intended for any commercial use.
