Yosemite window close button off center? I just updated my 13" MacBook Air (early 2014) to OS X Yosemite. The close button on the semaphore buttons at the top-left of the window has the x in it off center! That's not something I expect from Apple! It looked fine in Mavericks. I don't have this issue with my MacBook Pro at work, since that one has a Retina display. I Googled for it and some people report the same thing, but nobody says anything about fixing it. Has Apple acknowledged this and plans to fix it? I used Linux in the past and I'm seriously considering installing Linux on this machine due to this.

Changing the colors to graphite centers the x, but I don't like graphite. Please help
Your display is made up of pixels which are each made up of 3 subpixels, red, green, and blue. (This is the LCD part in the picture below.) Unfortunately, since red is on the left, it may look a little off center.



Here's a screenshot of the button:



and here's what it looks like on my display:



It would have been difficult for Apple to avoid this issue while still having the close button red. Graphite fixes this because the button is no longer red, and each of the subpixels is equal, so it doesn't look like it's shifted to the left.

In Mavericks, the button was a bit less saturated and a bit subtler, so that may be the reason why it seems to be a problem in Yosemite.