Error in Xcode 10.3 on macOS 10.15.3 on executing command SecCodeCopyGuestWithAttributes for macOS Cocoa application.[logging-persist] os_unix.c:43353: (0) open(/var/db/DetachedSignatures) - Undefined error: 0The file /var/db/DetachedSignatures does not exist. Any reason why? How to fix this?

How to disable "Prevent cross site tracking" in WKwebview for Mac app. "NSCrossWebsiteTrackingUsageDescription" key in info.plist doesn't seem to work. Also, no cookies received in decidePolicyForNavigationResponse delegate method of WKwebview. Though can see in network traces. Does WKwebview blocks 3rd party cookies.

User agent string on Big Sur has OS version 10_15_7. Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) This is observed on Safari as well as when programatically derived using WKWebView().value(forKey: "userAgent"). Similar bugs are reported on Webkit Bugzilla too. https://bugs.webkit.org/show_bug.cgi?id=213622 https://bugs.webkit.org/show_bug.cgi?id=216593 When is this expected to fix?