880      iPhone_iPad_Mac_apple

Weird half circle on my screen

When I opened my Macbook today I found this weird half circle at the to right corner under the task bar

but it doesn't show on the mission control page or the dashboard and it's really bothering me is there any way to get rid of it?  

最后更新：2017-10-14 19:23:12

  上一篇： why my picture wont save on applie id?

  下一篇： youtube goes blurry on fullscreen with High Sierra