Supplement essay not showing up on Preview in Mac?

<p>One of my essays for my supplements isn't showing up when I view it in Preview on the Mac. When I view it in Adobe Reader on a PC or Mac, or any other PDF reader, it shows up fine. Should I be concerned? Should I try to notify the college that there might be a technical glitch? I'm getting kinda worried now D:</p>

<p>Just to clarify, this was a Common App school and this didn’t happen for any other of my colleges.</p>

<p>As long as it shows up on other computers, you’re fine. I had the same issue.</p>

<p>It shows up on other computers, but not if it’s on Preview on the Mac. I guess it’s a Preview/Mac bug? Anyone else had this problem?</p>