Seven days ago I purchased a new MacBook Pro 15" (specs found in the sig line). I used PDFpen constantly with my previous MacBook, a Mid-2010 13" Core Duo 2 with 8 MB / 256 GB SSD. It was a glitchy, glitchy memory hogging piece of software. it would crash. The frame rates on the computer would go to nothing, especially when using it full screen (but even normally). Over half the reason I upgraded seven days ago was because I wanted PDFpen pro to work like a champ and I figured a new i7 MacBook Pro 15" rocket ship would do just that - handle PDFpen easily. Today, I used it for two hours and I'm telling you, I could've been out of it in an hour or so, if it would've been stable. I had to force it to quite six times and I never got finished what I was doing - I had to throw it over onto my iPad and use PDF Expert from Readdle. I don't like editing a PDF on my iPad, only signing documents - that is it! Is anybody else having or have had issues like this with PDFpen? I'm honestly not trying to slander them, but when the fastest laptops can't run it efficiently, what do we need, a Mac Pro with 12 cores?