Remove support for macOS

The macOS build is broken since the GitHub runners migrated from Intel
to Apple Silicon CPUs.

Issue: CW-608

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
 
     steps:

.github/workflows/jemalloc.yml

@@ -33,8 +33,6 @@ jobs:
         include:
           - alias: linux
             os: ubuntu-latest
-          - alias: macos
-            os: macos-latest
     runs-on: ${{ matrix.os }}
     needs: version
 

.github/workflows/mupdf.yml

@@ -33,8 +33,6 @@ jobs:
         include:
           - alias: linux
             os: ubuntu-latest
-          - alias: macos
-            os: macos-latest
     runs-on: ${{ matrix.os }}
     needs: version
 

README.md

@@ -1,5 +1,5 @@
 # LazyPDF
-This is a rasterizing engine for PDF documents built around [MuPDF][mupdf] and [jemalloc][jemalloc]. Works on Linux and macOS.
+This is a rasterizing engine for PDF documents built around [MuPDF][mupdf] and [jemalloc][jemalloc].
 <a target="_blank" href="https://icons8.com/icon/43610/copy">
   <img src="misc/assets/icon.png" align="right" height="96px" width="96px" />
 </a>
@@ -17,6 +17,12 @@ go build
 go test -race
 ```
 
+## Working with macOS
+Unfortunately this repository does not supports macOS. In order to run and test the code on macOS, run the code inside a Docker container:
+```shell
+docker run --rm -it --platform linux/amd64 -v ${PWD}:/code -w /code golang:1.22.3
+```
+
 ## Updating the native libraries
 To update MuPDF or jemalloc simply change its version at `misc/{library}/version` and submit the change at a pull request. GitHub Actions will then trigger the process of updating the library and headers through a series of commits at the pull request branch.
 

main.go

@@ -2,7 +2,6 @@ package lazypdf
 
 /*
 #cgo CFLAGS: -I ${SRCDIR}/misc/mupdf/include -I ${SRCDIR}/misc/mupdf/include/mupdf -I ${SRCDIR}/misc/jemalloc/include -I ${SRCDIR}/misc/jemalloc/include/jemalloc
-#cgo darwin,amd64 LDFLAGS: -L ${SRCDIR}/misc/mupdf/lib/x86-64-macos -lmupdf -lmupdf-third -L ${SRCDIR}/misc/jemalloc/lib/x86-64-macos -ljemalloc
 #cgo linux,amd64 LDFLAGS: -L ${SRCDIR}/misc/mupdf/lib/x86-64-linux -lmupdf -lmupdf-third -L ${SRCDIR}/misc/jemalloc/lib/x86-64-linux -ljemalloc -lm -lpthread -ldl
 #include <jemalloc/jemalloc.h>
 #include "main.h"