You may find out that it will update the BootCamp control panel, and that updated version should see your Mac boot volume. Open that Apple Software Update, and run it. A simple restart from Windows will then boot automatically to your Catalina system.Įdit: Look for the Apple Software Update, while booted to Windows. And, don't change the boot disk to select Windows while booted to Windows. Now, if you want to boot back to Windows, go through that Option-boot picker screen to choose the Windows boot drive. As with any new Windows computer, Microsoft requires that you. You will need to unlock that pane by clicking on the padlock.Ĭhange the boot drive. A Boot Camp Control Panel for Windows and an Apple Boot Camp system-tray item will be added. Set the boot disk to your macOS boot volume. When you boot back to your Catalina system, Open System Preferences, then Startup Disk pref pane. Choose your Catalina system, and press return to continue that boot. If your MBPro now only boots into Windows, but you know that the Catalina system should work, reboot holding the Option key to open your boot picker screen. One of the (major) things that happens when you update from Sierra to Catalina is that the format for the drive is updated from HFS+ (MacOS Extended) to APFS.Īnd, short story, Windows doesn't see any APFS partitions.