This is just a recent problem. My Mac Air says it is connected to the wireless internet, but won't transmit. I have run a diagnostics test several times, and it solves the problem for about one minute. Don't know what to do next, but I need this solved quickly.
MacBook Air
Go step by step by step and test.
1. Power off the router. Unplug it from the wall. Wait a while.
Plug it back to the wall. Power the router on. Wait until all the lights are lit properly. It will take a while.
Restart the computer.
Start up in Safe Mode.
http://support.apple.com/kb/PH14204
2. Delete Caches.db
Close all windows and quit all applications.
Hold "option" key down and click "Go" menu in the Finder menu bar.
Select "Library" from the dropdown.
Library > Caches > com.apple.Safari > Caches.db
Right click the Caches.db file and select "Move To Trash.
Close windows and relaunch Safari.
3. Empty Caches
Safari > Preference > Advanced
Checkmark the box for "Show Develop menu in menu bar".
Develop menu will appear in the Safari menu bar.
Click Develop and select "Empty Caches" from the dropdown.
4. Delete Cookies
Safari > Preferences > Privacy > Cookies and other website data:
Click the “Details” button.
Remove all cookies except from Apple, your internet service provider and banks.
5. Safari > Preferences > Extensions
Turn off Extensions if any and launch Safari again to test.
Turn on those one by one and test.
6. Deselect Proxies if selected.
System Preference > Network > Advanced > Proxies Tab
Under "Select Protocol", uncheck any box if selected.
Click "OK" then "Apply”.
I did all of the above, and now I can't get on our wireless network at all! We have two computers in the house that are fully functional on the web with our Wireless NETWORK. I get an error message every time now.
Thanks for the advice. So far, it is keeping me connected. However, when I try to attach something to an email, it won't show my files. It is just a blank screen. Also, when I cursor down the page, it shakes and distorts the picture. Any thoughts?
My Macbook Air will only connect to our wifi for a few seconds, then it switches off. Both our desktop and our iPad do not have such problem
