I'd like to get a window that has a semi-transparent blurred background, just like what the Terminal can do. See this video, about 30 sec in, to see what I mean: http://www.youtube.com/watch?v=zo8KPRY6-Mk I've been googling for an hour, and can't get anything to work. I believe I need to somehow create a core animation layer and add a background filter, but I've been unsuccessful so far... I just see the gray background of my window. Here's the code I've got so far: Code: // Get the content view -- everything but the titlebar. NSView *theView = [[self window] contentView]; [theView setAlphaValue:0.5]; // Create core animation layer, with filter CALayer *backgroundLayer = [CALayer layer]; [theView setWantsLayer:YES]; [theView setLayer:backgroundLayer]; CIFilter *blurFilter = [CIFilter filterWithName:@"CIGaussianBlur"]; [blurFilter setDefaults]; [theView layer].backgroundFilters = [NSArray arrayWithObject:blurFilter]; [[theView layer] setBackgroundFilters:[NSArray arrayWithObject:blurFilter]]; Any tips or examples to do what I'm trying to do? Thanks!