# Building and installing OpenCore
Now that we have a macOS installer, lets now build our OpenCore configuration!
If you haven't downloaded OpenCore Patcher yet, do so now:
Next, run the OpenCore-Patcher.app:
Here we'll select Build and Install OpenCore and start building:
| Start Building | Finished Building |
|---|---|
 |  |
Once it finishes building, you'll want to select the Install OpenCore button:
- If you created a macOS USB manually and don't see it listed, make sure it's either formatted as GUID/GPT or has a FAT32 partition for OpenCore to sit on
| Select Drive | Select Partition |
|---|---|
 |  |