If you are using Windows, you must close VirtualBox and run a VirtualBox macOS Unlocker script via Command Prompt to allow macOS to boot on non-Apple hardware.
If you can, the best practice is to use a and an officially supported method . If you must use an ISO for a virtual machine, always download the official installer yourself and convert it using a trusted tool on a Mac.
I can provide the specific configuration steps or boot commands needed to get your system up and running smoothly. Share public link
To ensure maximum security and the exact build you want, you can convert the official .app installer into an .iso file using Terminal: Download Macos Catalina 10.15.7 Iso File --39-LINK--39-
hdiutil create -o /tmp/Catalina -size 8500m -volname Catalina -layout SPUD -fs HFS+J hdiutil attach /tmp/Catalina.dmg -noverify -mountpoint /Volumes/Catalina sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Catalina --nointeraction hdiutil detach /Volumes/Catalina hdiutil convert /tmp/Catalina.dmg -format UDTO -o ~/Desktop/Catalina.cdr mv ~/Desktop/Catalina.cdr ~/Desktop/Catalina.iso
: Resolves issues where macOS wouldn't automatically connect to known Wi-Fi networks. iCloud Sync
cd "C:\Program Files\Oracle\VirtualBox\" VBoxManage modifyvm "Your_VM_Name" --cpuidset 00000001 000106e5 00100800 0054322d 7c7bfbff VBoxManage setextradata "Your_VM_Name" "VBoxInternal/Devices/efi/0/Config/DmiSystemProduct" "MacBookPro15,1" VBoxManage setextradata "Your_VM_Name" "VBoxInternal/Devices/efi/0/Config/DmiSystemVersion" "1.0" VBoxManage setextradata "Your_VM_Name" "VBoxInternal/Devices/efi/0/Config/DmiBoardProduct" "Mac-551B86E5744E2388" VBoxManage setextradata "Your_VM_Name" "VBoxInternal/Devices/smc/0/Config/DeviceKey" "ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc" VBoxManage setextradata "Your_VM_Name" "VBoxInternal/Devices/smc/0/Config/GetKeyFromRealSMC" 1 Use code with caution. If you are using Windows, you must close
Solution: Your virtualization software requires extra CPU masking parameters. Run the appropriate command-line patch tool for your Intel or AMD CPU processor.
hdiutil create -o /tmp/Catalina -size 8500m -volname Catalina -layout SPUD -fs HFS+J Use code with caution. Step 3: Mount the Blank Disk Image
To download macOS Catalina 10.15.7 , it is important to distinguish between a standard system update and a full ISO file used for virtual machines or bootable drives. Official Download Options I can provide the specific configuration steps or
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Note: The terminal will show progress from 0% to 100% as it erases the volume and copies the system files. This process may take several minutes depending on your disk speed. Step 5: Unmount the Finished Volume