Update downloaded last night. Attempted to install through clicking on the "Install Now" then "Restart" prompts. MBA hits the update load screen that is similar to the boot up screen with Apple Logo, progress bar and the wordy statement that your Mac is updating.
Progress bar moves about 5%, MBA restarts, reboots like normal, I log back in, MBA is not updated to 10.15.4 and takes a few minutes to offer a new update notification.
Tried updating in safe mode per research. No change.
Anyone else having this issue? Any thoughts on how to resolve this so the update installs?