Go to Software Update in System Preferences to find the macOS Catalina upgrade. Click Upgrade Now and follow the onscreen instructions to begin your upgrade. If you don’t have broadband access, you can upgrade your Mac at any Apple Store. The following tutorial will change the sudoers file and run a login script that runs software update at system startup and will not require any user interaction. This is great for environments with a large number of macs and eleminates the need to manually run software updates with an admin account. Testing conducted by Apple in June 2020 on production 1.4GHz quad-core Intel Core i5-based 13-inch MacBook Pro systems with 8GB RAM, 256GB SSD, and prerelease macOS Big Sur. Systems tested with WPA2 Wi-Fi network connection while running on battery power, with display brightness set to 12 clicks from bottom or 75%.

When you install iTunes or iCloud for Windows on your PC—or when you use Boot Camp Assistant to install Windows on your Mac—you get Apple Software Update for Windows.

Apple Software Update keeps the Apple applications on your PC up to date. It also delivers the latest Apple security and software updates to the Windows installation on your Mac.

How to run Apple Software Update

  1. Click on the Windows icon in the lower-left corner of your Windows screen.
  2. Type Apple Software Update in the search field.
  3. Click on Apple Software Update when it appears in the search results dialog.

Apple Software Update checks to see if any updates are available. Select the checkbox next to the updates that you want to install, click on the Install button, and then follow the onscreen instructions.

Apple Software Update for Windows runs once a week to check for updates. You can change this frequency to daily, weekly, monthly, or never in the application's preferences.

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Run Apple Software Update Windows 10

Get more info about using Boot Camp to install Windows on your Mac on the Boot Camp Support page.