This allows you to download the latest Mac operating system copy that is compatible with your machine. How to Reset a Mac before Selling on macOS 10.15īefore you begin to reset a MacBook or any Mac computer on macOS 10.15, ensure that the device is well and securely connected to reliable internet. So, this is a guide on how erase and factory reset your Mac on macOS 10.15 to leave it as good as new, clean and with a working macOS. More is done and this article will clarify what. As you learn how to reset a Mac to factory on macOS 10.15, understand that removal of personal information is not enough. This ensures that you are not open to identity theft and gives the new owner an opportunity to enjoy the machine. The process to reset a Mac before selling on macOS 10.15 involves removing content and data from the device. Microsoft Excel for macOS 10.14 Crashes.Numbers File Can’t Be Open on macOS 10.14.Can’t Open Keynote Files on macOS 10.14.macOS 10.14 Update Not Showing on App Store.Alternatives to Adobe Acrobat for macOS 10.14.