Tahoe 26.4 broke the copying of login keychains. Apple has at last explained how you can copy them successfully, and what backup software needs to do. Explained in full.
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This takes just a few seconds, and can fix problems that otherwise would require a restart. All depends on which processes need to be restarted.
Differences between file-based keychains including the login keychain, and Data Protection keychain. How the Passwords app in Sequoia caters for the latter.
macOS has two types of keychain, and its tools for working with them, Keychain Access and the command tool security, only work fully with one type.
Login and Background Items are increasingly common, and can cause all sorts of problems. Diagnosing and fixing them is better in Ventura.
Not only is loginwindow there in its full glory at the start of the user phase of startup, but it’s there until the bitter end.
Current apps may need to install helper files in the main Library folder for Background Items. Ventura’s new scheme keeps everything in the app bundle.
Login Items can cause many unwanted notifications when you log in. Here’s how to gain control over them, including use of an undocumented command tool.
Solving repeated requests for passwords, telling the genuine from the bogus, how passwords can become mismatched, and more.
What are keychains? What do they store? Which are essential on Macs, and why do you get prompted to enter your password for access to them? How secure are they in iCloud?
