Lagging system-wide using Mavericks on a recent Retina MacBook Pro with maxed out RAM. The display resolution is at Default for Retina. Spotlight is not indexing.
I can no longer Finder preview (select and hit spacebar) an MP4 that was compressed with Streaming Hints enabled. I can no longer Finder preview a WMV movie even though I have Flip4Mac installed.
Final Cut Pro X is lagging. Especially when you go back to it from another app.
Someone I know said that Nuke on his recent Retina MacBook Pro was lagging badly and even produced a faulty file.
Same symptoms on my work 2009 Mac Pro with lots of RAM. Fortunately, I installed Mavericks on a new drive on the Mac Pro making the machine dual-boot and I'm abandoning Mavericks on that machine for now and booting back into my Mountain Lion boot drive. But, I may be stuck on my laptop. I need to find a way to go back to Mountain Lion on that machine until there's a fix.
Don Smith - NewsVideo.com