This is the official book for the macOS Support Essentials 10.15course and you can use it to prepare for the Apple Certified Support Professional (ACSP) 10.15 exam. It’s a top-notch primer for anyone who needs to support, troubleshoot, or optimize macOS Catalina, such as IT professionals, technicians, help desk specialists, and ardent Mac users. This is the only Apple Pro Training Series book that covers macOS Catalina. You’ll find in-depth, step-by-step instructions on everything from upgrading, updating, reinstalling and configuring macOS Catalina to configuring network services like the Content Caching service.