It may have become QTKit, but QuickTime is still going strong, and now 24 years old.
QuickLook
How can I check whether QuickLook should provide previews of various types of documents?
What has broken when Preview no longer opens PDF documents? The answer is more complex than it might appear.
This is how to deal with an email attachment or web download which is not correctly recognised, to make it accessible.
Q Many of the video files I had before upgrading to Yosemite have lost their custom icons, showing […]
The Eclectic Light Company 