shows update but just spins looking for updates in software update
unable to update. in software update spins at looking for updates, does not complete or error message
how do I update
MacBook Air 13″, macOS 10.13
Question marked as
Several workarounds have been proposed, such as restarting your Mac in "Safe Mode" and checking for updates while in that mode, and / or resetting NVRAM.
How to use safe mode on your Mac - Apple Support
Reset NVRAM on your Mac - Apple Support
Related: Software Update stuck at "Checking for updates"… - Apple Community