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Hello,
I have MacBook pro the internet browser works well but after a while, the other applications can not connect to the internet such as mail and app store until restarting the computer then it works and after that, the same problem happens again.
The other devices connected to internet by the same router without any problem
Thanks
MacBook Pro (Retina, 13-inch,Early 2015), OS X El Capitan (10.11.3)
Wi-Fi problems can be somewhat difficult to diagnose because there are many things that can influence the performance, but there are some tools available:
system preferences > Network > Wi-Fi > ( assist me ) > ( Diagnostics )
this will check once for gross problems. But it tends to find none when your Wi-Fi is working, and not run at all when your Wi-Fi has dropped out.
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Hold down the Option key while you click on the Wi-Fi Icon on the MenuBar. This displays a number of important parameters about Wi-Fi performance. it will look a little like this:
what values are you showing for PHY Mode and channel?
What RSSI or signal strength?
what transmit rate?
and very important, how many other networks do you see listed?
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Note also that there is an entry for Wireless Diagnostics at the end of this menu. This can be invoked for a more comprehensive look at your Wi-Fi setup. Obvious problems will be pointed out, but when completed, you can also choose to leave the window open to monitor your connection.
If you do this and go about your business, Any unusual events will cause an alert message to appear.
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the diagnostics show that no internet connection while the browser works very well.
but the other applications can not connect to the internet.
I had restarted the router and I reset the factory setting also I connected by other router but the problem still in my mac and all other devices connect to the internet without any problem.
You are using channel 149 in the 5GHz band. There should be no completion there, so other networks should not matter as long as your Router is set to "automatic" channel selection in the 5GHz band.
802.11ac using an 80 MHz channel should give at least 200 and possibly as high as 400 Megabits/sec. But you are only getting a crummy 88 Mbits/sec. your signal strength is -78 -92 or a net -14, extremely poor. You appear to be too far away from your Router.
As a check against disconnected antenna wire, walk your MacBook to within 10 feet of your Router and check again. The RSSI should improve dramatically, from your current -78 to possibly in the neighborhood of -50. If it does not improve a lot, you may have a disconnected antenna wire inside your Mac.
I thank your response.
I have checked as what you told me but the problem still exists. the browser works but the other application can not connect to the internet until restart the Mac.
Thank you for your time 🙂
That is much better signal, and your transmit rate improved from 88 to 878 M bits/sec. That link is working fine up close, and you do not have a broken antenna wire in your MacBook Pro.
The location where you were using it is too far away from the Router, or too many walls and floors away. You should think about extending the Broadband medium (phone wire or Cable-TV cable or whatever) and relocating the Router to a more central location.
Computer won't reconnect Internet after drop out u ntil restart
