If you want, I can provide a step‑by‑step script tailored to a specific VM (VirtualBox, VMware Fusion, or Parallels) including VM settings and troubleshooting tips.
:Detach the volume and use hdiutil makehybrid to convert the .dmg or .cdr into a final .iso file. Important Considerations How to download and install macOS - Apple Support (IN) Download Macos Catalina 10.15.7 Iso File --39-LINK--39-
It is strongly recommended to only download macOS Catalina 10.15.7 from official Apple sources If you want, I can provide a step‑by‑step
Apple for macOS. Instead, they distribute .app installers inside a DMG or directly from the App Store. Here are the only legitimate methods: Instead, they distribute
Between 10.15.7 and the final security update (2021-004), Apple quietly fixed:
: Addresses a specific graphic issue on 27-inch iMacs (2020) with Radeon Pro 5700 XT. Apple Support : Apple ended official support for macOS Catalina on June 30, 2025