Removed mac os builds from ci; added LIBCLANG_PATH remarks to readme

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-latest]
     steps:
       - uses: actions/checkout@v2
 
@@ -45,7 +45,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-latest]
     steps:
       - uses: actions/checkout@v2
 

README.md

@@ -19,6 +19,8 @@ Install the following build tools:
 - clang
 - libusb-1.0 (only required on linux)
 
+Make sure that libclang can be found by either adding it to your `PATH` or via the `LIBCLANG_PATH=` environment variable.
+
 On Windows you additionally need to supply the proprietary `FTD3XX.dll`. It can be downloaded from the [FTDI Website](https://www.ftdichip.com/Drivers/D3XX.htm) in the `Application Library (DLL)` column.
 
 On Linux you need to check-out and compile the `leechcore_ft601_driver_linux` project from the [LeechCore-Plugins](https://github.com/ufrisk/LeechCore-plugins) repository.