Macbook not getting Internet

I now upgraded to yosemite and now it is connected to my network but no Internet

Everything seems to be configured properly

What is the problem????
brian ramdhaniCT Technician Asked:
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Chris MillardCommented:
Have you checked the IP configuration to make sure you've got a valid IP address, subnet mask, default gateway and DNS addresses?
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brian ramdhaniCT Technician Author Commented:
Yes all is well there
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Chris MillardCommented:
Is it on DHCP or Static? Have you rebooted your router and any wi-fi access points?
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brian ramdhaniCT Technician Author Commented:
Did that if I enter this http://74.125.224.72/ I am able to access Google but no other way

Something is conflicting
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Chris MillardCommented:
Sounds like DNS resolution isn't working properly on the MAC. Can you try clearing the cache?

sudo dscacheutil -flushcache sudo killall -HUP mDNSResponder
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Chris MillardCommented:
Forget my last comment - that probably won't work in Yosemite. Try:-

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist
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strungCommented:
Try adding 8.8.8.8 as a DNS server in the DNS tab in your network prefs.
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Justin BradshawOwnerCommented:
Definitely sounds like a DNS issue.
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David AndersTechnician Commented:
http://9to5mac.com/2015/05/26/apple-drops-discoveryd-in-latest-os-x-beta-following-months-of-complaints-about-network-issues-with-yosemite/

After many complaints from the developer community about poor networking performance on Yosemite, the latest beta of OS X 10.10.4 has dropped discoveryd in favor of the old process used by previous versions of the Mac operating system. This should address many of the network stability issues introduced with Yosemite and its new networking stack.
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David AndersTechnician Commented:
http://www.macissues.com/2015/04/30/five-quick-fixes-for-wi-fi-troubles-in-os-x/
Use custom DNS servers
While not specifically a Wi-Fi problem, if you are unable to load sites or are getting “Server not found” errors, then you can try using custom DNS servers other than those provided by your ISP (and subsequently by your router). To do this, go to the Network system preferences, select your connection, and then click the Advanced button. In the panel that drops down, select the DNS tab, and then click the plus button under DNS Servers to add new servers. In here, add the following two server IP addresses (these are Google’s public DNS servers):
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serialbandCommented:
Everyone just blindly adds google's 8.8.8.8 to their DNS.  There's a list of other public DNS that you can use too.  One day, google's going to have an outage and you should have an alternative secondary from another source to rely on.
http://public-dns.tk/

I keep a copy of the CSV file around locally, just in case. http://public-dns.tk/nameservers-all.csv

Always prepare a backup contingency.
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