Mac loses internet after wake from sleep, still connected to router

Question

Hi All,
So, I see similar threads, but I'm not sure if this is the same problem. Here's what happening:
-When I wake my Mac from sleep it usually (but not always) loses its internet (but not wifi) connection.
-The loss happens 10-15 seconds AFTER it wakes up. If I go to Safari/Firefox right after it wakes up, I can bring up webpages fine for about 10 seconds. Then, suddenly, pages stop loading.
-The wifi stays connected (I have an airport router) the whole time, and if I go to the airport utility, everything looks fine.
-I know this is not a problem with my internet or my router because I have tried opening web pages on both my iPhone (connected to wifi with cellular off) as well as my PC laptop (I only have it for one program that the company does not make for the Mac and I need for work, haha), and both browse the internet just fine even though my Mac says there is no internet.
-If I restart my Mac, the internet works fine. This is a simple fix, however it's also annoying to have to do it all the time.
-This is happening in different locations, not just on my wifi. It happens in coffee shops, hotels, and airports too.
-Not sure if this is related, but I have also been getting messages in iTunes saying that I need to authorize my computer or apps will be deleted.
-I completely deleted Norton, as I had a hunch it was responsible for this problem (since the internet was disconnecting right after getting an "add location" message from that program). However, even with it completely off my computer, I'm still having the issues.
Any suggestions???

Answer 1

What Mac OSX version are you running? "iOS 8.2" as currently shown in your profile cannot run on any Mac computer, only Apple mobile devices.
If your computer has automatically connected to a lot of networks, say, during travel, that might hinder waking as the computer looks for what networks it remembers. Go to System Preferneces > Network and select your wirelss connection from the left-hand pane. Then click the "Advanced" button in the main pain. That will show the list of networks you Mac has stored:
There could be a lot. Clear out all networks stored there except those you use on a weekly basis. The little box with the "-" icon clears unwanted networks. Restart the computer and see if thising work better.
-I completely deleted Norton, as I had a hunch it was responsible for this problem (since the internet was disconnecting right after getting an "add location" message from that program). However, even with it completely off my computer, I'm still having the issues.
Download and run Etrecheck, a safe way to post a snapshot of your config without revealing any personal information. I'm concerned you did not get all of Norton, or have some other dreck like CleanMyMac or MacKeeper lurking.
http://www.etresoft.com/etrecheck