Hello all! So I recently got the new 2017 MacBook Pro with TouchBar and I am extremely concerned about the lag in Preview. Whenever I try to open a large file (such as over 30 MB) preview works for a bit and then the color wheel of death appears and the whole application freezes. During this time, if I try to use another program (while I wait for preview to work) the pinch to zoom feature does not work throughout the whole MacOS UI. However, if I let the color wheel run for a bit, preview works again and I am able to pinch and zoom all throughout. This is extremely annoying and I am wondering if there is any fix to it. Thank you!