I have a 13" MacPro (2016) with Touch Bar, purchased about 2 1/2 years ago. It has Catalina 10.15.5 installed. An alert to update to 10.15.6 shows on System Preferences. When I try to update, it restarts but nothing is downloaded or installed. Have done this numerous times with the same result. Could it be because there is not enough available memory? (14.51 GB available of 250.69 GB If not this, what am I doing wrong? Never had this type of problem before. Thanks.
Bal
Bal