Fixing wi-fi issues on macbook air – basics
I bought a June 2013 Macbook Air one week ago to help me while working away from home. I had problems connecting to the internet where I was staying and it just got worse over the week until it virtually came to a grinding halt. At first I thought it was poor reception on the router but after reading this forum I thought that the problem could be with my Mac. I managed to speak to someone at the Helpline and within 10 minutes it was resolved. In order to help others, I’ve typed up what I remember she told me:
1. First check that the problem is not with your router by going connecting to the Wifi with your phone or another device. I did it on my phone and opened up my e-mails fairly quickly. My brand new Macbook Air however, was still waiting to open up my e-mails 5 minutes later!
2. Make sure you have no anti-viral software running which could slow it down.
3. Force Quit everything except Finder.
4. In Finder – go to Applications. Then Go to System Preferences. Third row down – internet and wireless – choose Network. On the left you should see that Wi-Fi is connected and it has a green dot.
5. In the same Network box – click Advanced (bottom right)
On the next page the central box Preferred Networks should list the networks you use.
If there are any there you don’t need, delete them by clicking on them and pressing delete (by pressing the minus key below).
6. Make sure the Network you use most is at the top of the list. Do this by dragging them up or down.
7. Next Quit System Preferences and Shutdown your computer.
8. Switch your router off and then on.
9. Hold down the following 4 keys for 10 seconds: Shift, Control, Alt and the Power Button.
10. Switch the computer on again and go to Network again (via System Preferences as above or by clickin on the Apple button and choosing System Preferences this way).
NB I'M NOT SURE WHAT THE HOLDING DOWN OF 4 BUTTONS DOES BUT EVER SINCE I'VE HAD A BOX ON THE TOP RIGHT WHICH SAYS OS X UPDATES AVAILABLE SO I ASSUME IT'S TO DO WITH THIS. I'M HOLDING OFF DOING THE UPDATES UNTIL I GET BACK HOME.
11. Choose Advanced Option again and make sure your preferred network is top of the list.
12. Click the second button along at the top (TCP/IP) and make sure the option for Configure IPv6 is Automatically.
13. Press Renew DHCP Lease and click okay when it prompts you.
14. Click on third button along (DNS) and in the box DNS Servers type:
8.8.8.8
8.8.4.4
(This is something to do with servers used by Google according to another post in this thread)
15. Now click Okay and then Apply
16. Finally make sure your OSX software is up to date by clicking on the Apple and choosing About this Mac. Click Software Update.
I am pretty sure I have remembered everything in the order she told me.
Now try your internet connection. It worked wonders for me. Good luck!