_______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a... This email sent to site_archiver@lists.apple.com Is it possible to fall back automatically to the CPU path if something "goes wrong" when attempting to process the filter in GPU mode? I tried returning NO from the renderOutput function, but it just put up an alarming screen saying it couldn't render, even though I had CPU mode enabled as well (I expected it to call renderOutput again in CPU mode). Also, what happens if I try to edit 4K footage on a machine with a 256MB graphics card? Does FCP just skip the GPU path in that case, or does it try to tile somehow, or does it just punt and tell you to upgrade? (the last is my personal preference - attempting to support 5 year old hardware is not terribly fun).