I am a new macOS developer, and the codesign issue is persistent. I've been trying to resolve it for days. There are two issues: 1.) When downloading and installing frameworks, they are not showing up in Xcode templates. 2.) Regarding codesigning, even though I've installed it on my external drive and placed it in various locations (Library, Templates, Frameworks, Application Contents, macOS Templates and Frameworks) and added through General Libraries in Xcode, persistently encountering issues. I'm experiencing a codesign problem. I've cleaned the build, cleared derived data, downloaded certificates, added them to the access key, and linked the binary. However, the issue persists. Please help me, as this is making the process much more difficult. I've been stuck on this for weeks.

I am using matlab to create an application (.app) using matlab application compiler. Along with that, I use matlab to create an installer for that. Unfortunately, the installer is in (.app) format. So do some custom things to install the dependencies and copying my application to Applications folder. I am able to sign the original application with Developer ID application certificate. But I am not able to sign the installer in .app format with Developer ID installer certificate. Is there any flag in any signing executable that allows me to use Developer ID installer certificate to sign .app file instead of typical (.pkg/.dmg)? Any help would be much appreciated.

After I upgraded to macOS 15.3, all of my current Xcode project have the signing issue, I spent half day and I didn't make any progress, I tried two projects, one is Swift AppKit App calling one C++ dylib, another one is a pure Swift AppKit app, when I build, there will be error: Warning: unable to build chain to self-signed root for signer "Apple Development: Steven Tang (XXXXX)" /Volumes/TwoTSSD/steventang/Library/Developer/Xcode/DerivedData/ImageEnhancement-ddbilgyraofrdyfeljyuknusunza/Build/Products/Release/ImageEnhancement.app: errSecInternalComponent I tried remove account, add account back in Xcode, none of it worked, also tried ChatGPT's WWDR updating and it won't help.