This is due to the latest Zoom versions requiring a Metal-compatible GPU for video rendering. The Zoom application does not show any video during meetings.
To rectify this, use Catalina Patcher to download a fresh copy of the Catalina installer, then re-create an installer volume and/or retry the installation. This occurs when the copy of the macOS Catalina Installer app used has gotten corrupted somehow. During installation, the installer reports that "An error occurred during installation", and mentions running diagnostics.Please follow the instructions in the "Important Info" section above to rectify. This is necessary in order to boot Catalina. Installing High Sierra on these machines will update the machine's system firmware, allowing it to boot from an APFS volume. This usually occurs on machines that support High Sierra (macOS 10.13) natively, but whose owners have not installed High Sierra on them previously. During installation, the machine keeps booting off the installer volume, and will not complete the second phase of installation.After that point, the affected application should no longer experience this crash. To work around this, immediately relaunch the affected application after receiving the crash message. This is an issue Apple introduced in 10.15.4, and is not an issue with the patch itself. Some third-party applications do not open or crash on launch.Download the latest Catalina Installer using the latest Catalina Patcher version. This happens when using a release of the macOS Catalina Installer App that is incompatible with the version of Catalina Patcher you are using. I get an error saying "The installer is damaged, and can't be used to install macOS".The 2007 iMac 7,1 is compatible if the CPU is upgraded to a Penryn-based Core 2 Duo, such as a T9300. 2006-2007 Mac Pros, iMacs, MacBook Pros, and Mac Minis:.Macmini5,x (systems with AMD Radeon HD 6xxx series GPUs will be almost unusable when running Catalina.).
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