Problems Connecting to Wifi

[Mr.Outside]

A few days ago I noticed that every time I wake my Mac from sleep it can't connect to my home wifi. When I wake it up I have to reset my router and it connects just fine and stays connected as long as my Mac is awake, but as soon as I close it and open it again it won't connect. More specifically it does say it's connected to my network but there is no internet connection.

I figured it was a problem with my network but other devices will have a connection when mine doesn't. Could this be an issue with my hardware? Wireless card?

 

[TheCakeIsALie]

Known issue with the new rMBPs. No need to reset router just turn your laptop wifi off and on again. Hopefully they'll fix it in a patch. More info: http://tuaw.com/2013/11/18/some-new-retina-macbook-pros-suffering-from-wi-fi-issues/

 

[Mr.Outside]

The Mac I'm using is a mid-2010.

 

[AlecMyrddyn]

Try deleting all your saved Network information and Keychain entries for you wifi network. Then once network preferences are cleaned out, re-add the WiFi network.

I had similar problems in the past due to the Keychain entry for the saved password somehow getting corrupted.

https://discussions.apple.com/message/17744757#17744757 might help.