You have a clean (new) install of macOS 12.3.1. It doesn't have python. https://developer.apple.com/documentation/macos-release-notes/macos-12_3-release-notes Search the interweb to find why 'python' doesn't usually resolve automatically to python3, and the various ways you can install multiple versions of python on your machine. I use pyenv.

from NSWorkspace.h (void)setDefaultApplicationAtURL:(NSURL *)applicationURL toOpenContentTypeOfFileAtURL:(NSURL *)url completionHandler:(void (^_Nullable)(NSError *_Nullable error))completionHandler API_AVAILABLE(macos(12.0)); before macOS 12, use LSSetDefaultRoleHandlerForContentType from LSInfo.h in the LaunchServices framework. No idea how to do this with AppleScript. You could use Automator to make a Folder Action for any file matching a pattern in a particular directory. You'd probably want to put a Set Application for Files action after a Filter Finder Items action.

you're looking at the Code Review panel. There are no changes to review, so it is blank. You need to turn off the view by clicking the control indicated here:

https://developer.apple.com/forums/thread/128166 also, read the man pages for codesign and spctl, carefully. Read the log files from your failed notarization attempt - they're telling you what is wrong. Your app isn't signed, you didn't add the timestamp flag, you didn't enable the Hardened Runtime.

I'm pretty sure the reason this is happening is because you are trying to put the string "helloworld" into x. x has room for 10 chars, "helloworld" requires 11, because strcat wants to put the terminating null into the destination too. You can right-click on strcat and choose Services/Open man page in Terminal from the contextual menu to read about the correct use of strcat.

is it intentional that the bundle ID has the Team ID appended, while launchctl list is asked to look for something with the Team ID prepended?

Quinn, thank you for the hint. I was filtering the Console output on my app name, the culprit was fingered by sysextd a few lines further up when I turned off that filter - I didn't prefix my Mach service name with the name of the app group in my entitlement. For future reference, the error 9 is listed in SystemExtension/SystemExtensions.h, and the term to search the SDK for is "OSSystemExtensionErrorDomain"

Paul Hudson's Swift on Sundays series on YouTube has this - https://www.youtube.com/watch?v=TJfh8wXbfEw A functioning game in an hour and a bit, and 160 lines of code.

2 days ago there was an outage of the notarization service, and a performance problem which persisted a few hours beyond the outage. You can visit https://developer.apple.com/system-status/ if things are taking a suspiciously long time, that's how I know.

I think the next step beyond "learning coding" is learning to apply that knowledge to a particular domain. Code does something, usually something useful to yourself or other people. What useful thing would you like to make possible? What would you like to learn, and how does being able to code help you with that goal?

are you sure you're leaking memory created by the call to IOCreatePlugInInterface? It creates an interface, as its name suggests, returned in pHandle. Are you releasing that interface when you're done with it?

what do you mean by "does not work"? your code doesn't compile, primarily because UIKit is not available on macOS (AppKit is, so your UIViews should be NSViews). Even so, in setupCamera you refer to a variable called 'view' which is not declared.

You're better off asking such non-developer questions on a customer support forum. Are you trying to share a WiFi connection over WiFi? You can't do that.

I entered your code and ran it. Byte doesn't stop walking because Byte isn't done. There's a little scoreboard at the top left of the scene - it shows Bytes has collected 1/1 gems and tripped 0/1 switches. Try to split your code into functions which do only one thing, and are well named. For instance, rename 'checker' to 'checkSwitch' and have it only change the switch state if necessary, rather than sometimes changes switch state, and sometimes move forward. In this exercise, the path is predictable (you can see it), so your steps can be a list of instructions, with no branches and no conditionals.

I think you should start by reading this post https://developer.apple.com/forums/thread/39204