With the new MacOS, "High Sierra", I found an inconvenience while typesetting a document with TeXShop: just after compiling (Cde T), the Preview window becomes black for a very short time (fleeting). It's visually annoying. I wonder if other users have the same behaviour on their Mac (I have a MacBook Pro, one year old)? For the rest everything ok ! AG
This problem is fixed in TeXShop 3.94 and 3.95. It is caused by new behavior of PDFKit and is visible when an application opens a pdf to a page number higher than page one. Fixing the problem within PDFKit is not possible; instead a fix requires additional application code.