![]() ![]() ![]() The new installer (19G2021) will work on them. This means you do not have to keep a separate installer if you have any of the new iMacs in your fleet. The good news about this update is that includes the 2 new BoardIDs for the 2020 iMacs. I guess Apple decided to get a head start this year. After the switch the build version usually makes the jump to 4 digits. For example when Big Sur is released, Apple will stop working on bug fixes for Catalina and will only send out security updates. Looking back at 10.13 and 10.14, this is true only when Apple starts to release 2020-001 type security updates. UPDATE: – Erik Gomez mentioned that 4 digit daily builds are common near the end of an OS release. Why did Apple give this unified installer a forked build version number (19G2021) ? ![]() Tidbits has a great article that explains Apple build versions. When a new dot release comes out, Apple will unify the installer so it can be install on any Mac including the new hardware. To resolve this, Apple will release a full installer that has this new hardware included but will only install the new hardware. It includes brand new hardware drivers that the previous builds of macOS didn’t include. A perfect example of this is when Apple released the new 2020 iMac. A “Forked” installer means that it will ONLY install on brand new hardware from Apple. Normally a 4 digit end number on a macOS build version number means that it’s a “Forked” installer. The Build version for this update is (19G2021). The other fix has to do with the brand new 2020 5k 27-inch iMac. You can read more about the issue from Howard Oakley and a VMware engineer. This time around, the fix is for memory leaks with virtualization software. Today Apple released the 5th Supplemental Update for macOS Catalina. MacOS Catalina 10.15.6 Supplemental Update (19G2021) Released! macOS Catalina 10.15.6 Supplemental Update is now Available. ![]()
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