HELP WANTED! IN-GAME - Random HALF-Freeze up. Recurrent problem.

Hi Riot & Friends,

I have been experiencing an odd in-game freeze up that I can only describe as follows: Once every other game or so, I would suddenly (usually after 20 minutes of game duration) be unable to use half of the in-game functions which would render me nearly useless during vital parts of the game (particularly during ranked games).

For example, these errors are recurrent (occur all at once when this glitch does occur):

• Can't open store pressing "p", but can open with a right mouse click. Cannot buy anything with a right click when store is open.
• ESC button no longer functional at all. Cannot pop open ESC menu.
• Once every other time my right click functions for moving my champion around stops working (I have died while pushing because my champ wouldn't stop hitting the tower and refused to move anywhere else. I even flashed and it ran back to hit the tower)
• Cannot click on mini-map. Mini-map appears to be frozen.
• Toggle functions above mini-map also appear glitched/unfunctional.

What has been able to function during these glitches:

• Can still type normally into chat, so I can warn team about having to force-quit, reboot league
• "d" and "f" key definitely still work. I believe "q,w,e,r 1,2,3,4" still work but start losing function. Some keys would suddenly stop working once every other glitch. For example, sometimes q,w,e,r would not function anymore during a glitch whereas right-click mouse functions would still work and then vice-versa another time.

What I have tried to fix this issue:

• I have attempted to Force-Quit & Reconnect right away to the game, however each time I have done so, I failed to reconnect in time (the game would end due to my absence in such a vital moment of the game). Thus, I am not sure if the glitch would have disappeared after I reconnected successfully.

System Information: MacBook Pro 13-inch, Mid 2012 2.5 GHz Intel Core i5 4GB RAM 1600MHz DDR3 Intel HD Graphics 4000 512MB OS X 10.8.5

Please help! Thank you!