Live chess problem

I have a major problem which makes it almost impossible to win a blitz or bulet or even standard game. The problem is each time i play a game I keep losing time that I don't know enen know I'm losing. Let's say it is a one minute game. So I make a move then it's on my oppents clock and by the time it gets to 40 seconds it says connection interuted and I'm at like 30 sec. If any one knows how to fix this on a apple mac, help would greatly be appericated. Thank you