From SIP to a protected read-only System volume, macOS 11 takes system protection a big step further with cryptographic verification.
Many vital apps rely on installing kernel extensions, which may be tricky or seem impossible in Catalina. Here are some strategies to solve problems.
Why third-party kernel extensions may have problems working in Catalina, and whether those KEXTs will become SEXTs.
Important updates if you’re running Catalina, as they add the KEXT blocker back into their checks.
Details of their locations, purposes, and the current installed version. These have changed a great deal since Mojave.
System Integrity Protection can get in your way, and may be recommended to solve compatibility problems. It’s also changing again in Catalina.
The two biggest changes in Catalina are loss of 32-bit software and the requirement for notarization – which also affects Mojave. All is explained.
When the Installer refuses to complete an installation package containing kernel extensions, here’s how to fix the whitelist so that installation works.
Apple provides detailed information about how to stunt your Mac’s performance to mitigate against MDS, but doesn’t mention how notarization has become mandatory, and can block extensions and apps from running.
Over 6 GB of files installed, this brings many updates to bundled apps including Safari 12.1.1, changes to iTunes, and small changes to APFS too. Here are the details.