# # 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:

- OpenCore Legacy Patcher Releases
  (opens new window)

Next, run the `OpenCore-Patcher.app`:

Here we'll select Build and Install OpenCore and start building:

Start Building | Finished Building
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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
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# # Once finished, head to Booting OpenCore and macOS