I've cross posted this at https://stackoverflow.com/q/79647300/6230282 Basically, I use command line and emacs app to develop on daily basis, but all of a sudden, LLDB is invoking Xcode to display source code for me, instead of printing them in command line. How do I switch back? Or alternatively, can I set a custom editor for LLDB? (lldb) version lldb-1700.0.9.502 Apple Swift version 6.1.2 (swiftlang-6.1.2.1.2 clang-1700.0.13.5) About Xcode: Version 16.4 (16F6)

I've completed a simple app that plays 3D video. Now, I'm trying to make it open files from the menu, as well as using the Cmd-O keyboard shortcut. But the "Open" menu item in the "File" menu is gray - I don't know exactly what this means, but it seems that the current form of the app doesn't support openning files. I've had a func application(_ application: NSApplication, openFile filename: String) -> Bool function in my app delegate, I've had a CFBundleDocumentTypes with an entry of the MIME type of "video/mp4". What am I doing wrong?

I have a DLP-Link 3D projector which I'd like to make use of by means of a hand-made player. So far in my project: A class MovieView : NSView within a NSWindow, with stub drawing codes. I know that, if I place drawing codes in the func draw(...) function, then NSGraphicsContext.current will be set up for me to use. But I'm drawing from a high-priority thread (the DisplayLink), so I obviously have to set it up myself. How should I do that in Swift?