10.15.2 update
Hi, I tried to install update, but for some reason, after reboot I observed the update is still available for installation and actually was not installed.
MacBook Pro 13", macOS 10.15
Question marked as
Try again but this time instead of using WiFi try a cabled connection to your router, don't use the mac while it is downloading.
Or you can download the standalone update from here, https://support.apple.com/kb/DL2028?viewlocale=en_US&locale=en_US
once downloaded double-click to install.