I have a brand new MacBook Pro 13 inch. I have noticed that Proclaim runs a bit sluggish at times. For example I am not able to use the UI for several seconds when switching between apps on the desktop, I get a delayed response. I also find it challenging to move from slide to slide when you have a large number of slides in a set. For example a worship song that has for than 7 slides. If I try to scroll to see the remaining slides, it jumps to quickly and throws me off. I think the biggest issue is how the app is handling the CPU. The delayed / jumpy scrolling behavior and at times, the unresponsive UI are threading issues, the app needs to be CPU Optimized for UI performance.