Officially, Ventura supports Macs from 2017 onward (e.g., MacBook Pro 2017, iMac 2017), so if your Mac is older (e.g., pre-2017), this method lets you run Ventura in a VM on your existing macOS host.
Below are detailed steps tailored for this scenario.
A video shows how to install macOS Ventura on unsupported MAC using parallels desktop
Prerequisites
Old Unsupported Mac: Any Intel-based Mac running a compatible host macOS (e.g., High Sierra 10.13 to Monterey 12.x). Apple Silicon Macs (M1/M2) have different VM constraints—confirm your Mac is Intel via About This Mac (shows “Intel” in the processor field).
Parallels Desktop: Version 18 or later (19 recommended as of April 6, 2025). Download from parallels.com (trial or licensed).
Host macOS: Must support Parallels (e.g., macOS 10.13.6 or later for Parallels 18+).
Space: 20GB free minimum (64GB+ recommended) for the VM and Ventura installer.
Ventura Installer:Install macOS Ventura.app or a Ventura .ipsw file (for Parallels on newer hosts).
Internet: Needed to download Ventura if not pre-obtained.
Step-by-Step Instructions
1. Verify Your Mac and Install Parallels Desktop
Check Host macOS:
Apple menu > About This Mac. Note your version (e.g., Monterey 12.6).
Clone gibMacOS: git clone https://github.com/corpnewt/gibMacOS.git cd gibMacOS python3 gibMacOS.command
Select “macOS Ventura” (13.x) from the list, download the .pkg, and extract: pkgutil --expand-full "macOS Downloads/publicrelease/InstallAssistant.pkg" ~/Desktop/VenturaInstaller mv ~/Desktop/VenturaInstaller/Applications/Install\ macOS\ Ventura.app /Applications/
Method 2: Use Another Mac
On a supported Mac (2017+), download Ventura from the App Store, then transfer Install macOS Ventura.app to your old Mac’s /Applications via USB or network.
Verify:
Check size: du -sh /Applications/Install\ macOS\ Ventura.app
Should be ~12-13GB.
3. Create a New Virtual Machine in Parallels
Launch Parallels Desktop:
Open from /Applications or Dock.
Start New VM:
Click File > New or the + button in the Control Center.
Choose Installation Source:
Using Installer App (Intel Macs):
Select Install Windows, Linux, or macOS from an Image File.
Drag Install macOS Ventura.app from /Applications into the window, or click Choose Manually to locate it.
Click Continue.
Note: If your host is Ventura or later, Parallels might require an .ipsw file instead—see Troubleshooting for details.
4. Configure the VM
Set VM Details:
Name: e.g., “Ventura on Old Mac”.
Location: Default is fine (e.g., ~/Parallels).
Customize Settings (Optional):
Click Customize Settings Before Installation.
Hardware > CPU & Memory: Allocate 4 CPUs and 8GB RAM (adjust based on your Mac’s total—don’t exceed half).
Hard Disk: Default 64GB is fine; increase if needed (e.g., 128GB).
Graphics: Set to “Best for Retina” or adjust VRAM if your Mac supports it.
Save and Proceed:
Click Create.
5. Install macOS Ventura
Boot the VM:
Parallels starts the VM and boots from the Ventura installer.
Install Process:
Select your language, click Continue.
Choose Install macOS Ventura > Continue.
Agree to terms, select the virtual disk (e.g., “Macintosh HD”), and click Install.
Wait:
The VM restarts multiple times (20-40 minutes). Don’t interrupt—watch the progress bar.
Setup:
After installation, complete the macOS setup (language, Apple ID, etc.) to reach the Ventura desktop.
6. Enhance the VM (Optional)
Install Parallels Tools:
Parallels menu > Actions > Install Parallels Tools.
Mounts a virtual CD—double-click Install in the VM and follow prompts.
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