macOS Catalina 10.15.7 Supplemental Update and Security Update 2021-002 (Mojave)

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Originally published at: macOS Catalina 10.15.7 Supplemental Update and Security Update 2021-002 (Mojave) - TidBITS

Patches security vulnerabilities in Catalina and Mojave. (Free, various sizes, macOS 10.15.7 and 10.14.6)

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Update installed on my mid2012 macbook pro, all working fine except
-some random glitch/flashes in the screen (persistently in the boot)
-when connected via thunderbolt with my external screen, the built-in screen goes deactivated,
and remains lit but solid black with no signal going into it.
-The laptop overall got very very slow right after the update, but somehow it’s retrieving speed as the days go on, so this is not really an issue.