On Macintosh HD info admin is read only. I am the admin, but when I try to change it to read and write I get a message
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And that error message is? – IconDaemon Nov 05 '20 at 12:51
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Are you trying to change permissions to the top level of the system volume? In Catalina, that's a read-only volume, so no changes are possible (and it's also restricted by System Integrity Protection). More info in this question: "Catalina not allowing to change read/write permissions despite having SIP disabled" – Gordon Davisson Nov 05 '20 at 14:11