Cannot update from 10.15.2 to 10.15.6 My wife's MacBook is currently running 10.15.2
She hasn't updated for some time, indeed she hasn't used the MacBook recently.
She tried to update, but had insufficient space.
We deleted some documents, and then tried to update.
This seemed to be OK, but on restart she was prompted to update to 10.15.4
This then was overwritten by an update to 10.15.6
We have tried several times but it remains on 10.15.2, and the whole cycle repeats.
How can we install updates?
I managed to catch the prompt to update to 10.15.4 which I tried - and failed. After this the 10.15.6 update downloaded the update (which it hadn't been before) and it worked. I will certainly use the combo update if the situation ever arises again.