Mac Issues

Hello fellow Summoner. Today I'm here to discuss an issue I been having since the release of pre-season 5. I currently play on a MacBook and there's two major issues that happen way to often. So the first is being stuck at base while being held back by a invisible wall. Yes it sounds silly but it only happens when I load in late and then I come in around fifty seconds in and its like the wall that's there in the beginning is still there and won't let me pass and when I try to flash out or use any spell that moves me it just sends me back to base when I click somewhere. The other problem is when I load in the game late again and it forces me to walk to the enemy's base. I can't change direction and I'm just forced to suicide or stay in base and reconnect which takes five minutes and it crashes me most of the time me so it's not even a solution. Please someone help ?