Mac Screensettings Bug (Crash)

this is a longer story because i have some problems with my screensettings since i start playing league last season. the bug changed since then but its still not bug free. im not gonna describe how it was last season , since u have changed some riot seems to be aware of this. i think its a problem on mac games in general since i had similar issues in many diffrent games . It starts with my screensetting changing when i leave champion select and enter the loading screen . they will be set to how i had them in the last game . For example when it will be full screen if i had it set on full screen before and a small window if set on borderless . Also the resolution will be changed . Of corse i wanna play in fullscreen and high resolution so when i enter a game i will have to change it . At this point my game will crash and bugsplat opens not all the time but i would say almost 50 % of the time . Its very easy to reproduce since i can change settings as often as i want . Another issue with this bug is that if i forget to open the shop window atleast once before i change the screen settings the setting for the shop wont change at all or wont change right the window will be too big so i cant sell items and just cant see the whole shop overall . I would really love to just have my screen settings set right when i enter a game . Or at least not have the game crashed when i change them. If u need more info let me know i can also post screenshots of the shop window if needed . Pls riot fix this i got so many reports for this and lost a lotta ranked games its really getting depressing. PS : this is not related to mac crashing on patch 5.14 since it has been around before but now i have my game crash like 20 times in a single game i cant take it no more !!! Greetings from a frustated mac user

My Hardware : Software : OSX Yosemite 10,10.4 Processor : 3,06 GHz Intel Core 2 Duo Memory : 4 GB 1067 MHz DDR3 Graphics : NVIDIA GeForce 9400 256 MB