Install macOS Sierra 10.12 Download macOS Sierra The full operating system is a free download for anyone who has purchased Mac OS X Snow Leopard, Lion, or Mountain Lion or has a Mac preloaded with OS X Mavericks, Yosemite, El Capitan, or macOS Sierra. Download the Application from the Mac App Store using your Apple ID on any Mac or functional computer running OS X 10.7.5 or later. 1. Open Mac App Store 2. Log in with your Apple ID 3. Download macOS Sierra The Application Install macOS Sierra will appear in /Applications. 4. Click Erase button 5. For Name: type USB (You can rename it later) 6. For Format: choose OS X Extended (Journaled) 7. For Scheme: choose GUID Partition Map 8. Click Erase then Done 9. Download and run UniBeast 10. Click Continue, Continue, Continue, Continue, Agree 11. At Destination Select, choose USB and click Continue 12. At Select OS Installation screen choose Sierra and click Continue 13. At Bootloader Options screen choose UEFI Boot Mode or Legacy Boot Mode. UEFI Boot Mode is recommended for 7/8/9/100 Series CustoMac desktops and all UEFI capable systems. Legacy Boot Mode is recommended for 5/6 Series CustoMac desktops and all BIOS based systems. 14. (Optional) At Graphics Configuration screen choose the appropriate graphics option for your system and click Continue. 15. Verify installation options, then click Continue, enter password and click Install UniBeast will now create the bootable USB drive. The process will only take about 10 minutes, depending on system and drive speed. Do not unplug or stop during this time. 16. Drag MultiBeast to your completed USB drive. Clover Note: UniBeast delivers basic bootloader support based on our testing on recommended CustoMac systems. For further bootloader customization, download and run the official Clover package. Advanced users may also compile Clover by downloading the full source. Gigabyte AMI UEFI BIOS, Gigabyte AWARD BIOS, ASUS AMI UEFI BIOS, and MSI AMI UEFI BIOS. 1. To access BIOS/UEFI Setup, press and hold Delete on a USB Keyboard while the system is booting up 2. Load Optimized Defaults 3. If your CPU supports VT-d, disable it 4. If your system has CFG-Lock, disable it 5. If your system has Secure Boot Mode, disable it 6. Set OS Type to Other OS 7. If your system has IO SerialPort, disable it 8. Set XHCI Handoff to Enabled 9. If you have a 6 series or x58 system with AWARD BIOS, disable USB 3.0 10. Save and exit. Clover Basics and Switching Advice. 6. For a new installation of macOS, you MUST erase and format the destination drive according to the following steps before continuing. a. In the top menu bar choose Utilities, and open Disk Utility b. Highlight your target drive for the Sierra installation in left column. c. Click Erase button d. For Name: type Sierra (You can rename it later) e. For Format: choose OS X Extended (Journaled) f. For Scheme: choose GUID Partition Map g. Click Erase h. Close Disk Utility 7. When the installer asks you where to install, choose Sierra, or your existing install. 8. Upon completion, the system will automatically restart. MultiBeast 7. If this is a fresh installation, click Quick Start. UEFI Boot Mode is recommended for 7/8/9/100 Series CustoMac desktops and all UEFI capable systems. Legacy Boot Mode is recommended for 5/6 Series CustoMac desktops and all BIOS based systems. 8. Choose the appropriate audio and network options for your system: 9. Click Customize for further options 10. Click Print or Save to back up your configuration 11. Click Build then Install If using a NVIDIA 'Maxwell' GeForce GTX 750, 750 Ti, 950, 960, 970, 980, 980 Ti, or TITAN X graphics card, macOS Sierra graphics drivers are not natively supported. Alternate NVIDIA drivers are required. 12. (Optional) Download and install Alternate NVIDIA Graphics Drivers 13. Reboot Yay! You now have a fully updated bootable version of macOS Sierra on your CustoMac! And a super handy USB rescue drive. It's easy to get frustrated, but don't give up! If you get stuck, there are many users with similar hardware in the tonymacx86 Forum to provide support.