As the title suggests I have been having problems maintaining a stable internet connection no matter how I am connected using wifi/ethernet/usb. I thought it was my AT&T MiFi which occasionally does lock up and needs to be restarted, but since 10.9.3 I need to restart my computer to restore it which is a 2013 15" cMBP, last gen. before phased out. I have read about similar issues on discussion.apple, but no one really seems to have a solution yet. Anyone else have this issue or any suggestions?