macOS Sierra Patcher
Create drives containing distributive files for Mac OS Sierra. Customize the boot parameters and the content of the system. Enable the compatibility with regularly unsupported devices, automatically disable SIP in the current system, then install Sierra over it.
The 4.2.7 version of macOS Sierra Patcher for Mac is provided as a free download on our software library. The latest installer that can be downloaded is 26.3 MB in size. The program is included in System Tools. Our antivirus analysis shows that this Mac download is malware free. This free Mac app was originally designed by Collin Mistr.
From the developer:
macOS Sierra Patcher is a free-to-use application for Mac OS that allows you to easily create a modified install drive to use for installing macOS Sierra on unsupported Mac computers. Make sure SIP is disabled on the system you intend to install Sierra on.
You may want to check out more software for Mac, such as macOS Sierra Software Update Patch, macOS Mojave Patcher or macOS Catalina Patcher, which might be similar to macOS Sierra Patcher.