diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2f79b10d..87f9470b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,10 +12,10 @@ permissions: {}
 
 jobs:
   build-and-test-native:
-    runs-on: ${{ matrix.operating-system }}
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        operating-system: [ubuntu-22.04, ubuntu-24.04, ubuntu-24.04-arm]
+        os: [ubuntu-22.04, ubuntu-24.04, ubuntu-24.04-arm, macos-15]
     steps:
       - uses: actions/checkout@v4
 
@@ -26,6 +26,8 @@ jobs:
         run: |
           if [[ "${{ runner.os }}-${{ runner.arch }}" == "Linux-ARM64" ]]; then
             curl -fOL https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-linux_arm64-latest.tar.gz
+          elif [[ "${{ runner.os }}" == "macOS" ]]; then
+            curl -fOL https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-macos_apple_silicon-latest.tar.gz
           else
             curl -fOL https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-linux_x86_64-latest.tar.gz
           fi
@@ -43,12 +45,17 @@ jobs:
 
       - run: ./roc_nightly/roc version
 
-      - run: |
-          sudo apt update
-          sudo apt install -y expect ncat valgrind ripgrep
-      # expect for testing
-      # ncat for tcp-client example
-      # ripgrep for ci/check_all_exposed_funs_tested.roc
+      - name: Install dependencies (Ubuntu)
+        if: startsWith(matrix.os, 'ubuntu-')
+        run: |
+          sudo apt install -y expect ncat ripgrep
+
+      - name: Install dependencies (macOS)
+        if: startsWith(matrix.os, 'macos-')
+        run: |
+          brew install expect # expect for testing
+          brew install nmap  # includes ncat, for tcp-client example
+          brew install ripgrep # ripgrep for ci/check_all_exposed_funs_tested.roc
 
       - run: expect -v
 
@@ -56,9 +63,10 @@ jobs:
         run: ROC=./roc_nightly/roc EXAMPLES_DIR=./examples/ ./ci/all_tests.sh
 
       - name: Install dependencies for musl build
+        if: startsWith(matrix.os, 'ubuntu-')
         run: |
           sudo apt-get install -y musl-tools
-          if [[ "${{ matrix.operating-system }}" == *"-arm" ]]; then
+          if [[ "${{ matrix.os }}" == *"-arm" ]]; then
             # TODO re-enable once TODO below is done: rustup target add aarch64-unknown-linux-musl
             echo "no-op"
           else
@@ -66,10 +74,11 @@ jobs:
           fi
 
       - name: Test building with musl target
+        if: startsWith(matrix.os, 'ubuntu-')
         env:
           ROC: ./roc_nightly/roc
         run: |
-          if [[ "${{ matrix.operating-system }}" == *"-arm" ]]; then
+          if [[ "${{ matrix.os}}" == *"-arm" ]]; then
             # TODO debug this: CARGO_BUILD_TARGET=aarch64-unknown-linux-musl $ROC build.roc
             echo "no-op"
           else
@@ -77,8 +86,9 @@ jobs:
           fi
 
       - name: Test using musl build
+        if: startsWith(matrix.os, 'ubuntu-')
         run: |
           # TODO remove `if` when above TODOs are done
-          if [[ "${{ matrix.operating-system }}" != *"-arm" ]]; then
+          if [[ "${{ matrix.os }}" != *"-arm" ]]; then
             NO_BUILD=1 IS_MUSL=1 ROC=./roc_nightly/roc EXAMPLES_DIR=./examples/ ./ci/all_tests.sh
           fi
diff --git a/ci/expect_scripts/path-test.exp b/ci/expect_scripts/path-test.exp
old mode 100644
new mode 100755
index 79f20dfe..5d3da4f8
--- a/ci/expect_scripts/path-test.exp
+++ b/ci/expect_scripts/path-test.exp
@@ -45,14 +45,14 @@ test_parent/test_child/test_grandchild
 Number of directories created: 3
 Directory contents:
 total \\d+
-dr\[-rwx\]+ +\\d+ \\w+ (\\w+ )? *\\d+ \\w+ +\\d+ \\d+:\\d+ \\.
-dr\[-rwx\]+ +\\d+ \\w+ (\\w+ )? *\\d+ \\w+ +\\d+ \\d+:\\d+ \\.\\.
--\[-rwx\]+ +\\d+ \\w+ (\\w+ )? *\\d+ \\w+ +\\d+ \\d+:\\d+ file1\\.txt
--\[-rwx\]+ +\\d+ \\w+ (\\w+ )? *\\d+ \\w+ +\\d+ \\d+:\\d+ file2\\.txt
-dr\[-rwx\]+ +\\d+ \\w+ (\\w+ )? *\\d+ \\w+ +\\d+ \\d+:\\d+ subdir
+d.* \\.
+d.* \\.\\.
+-.* file1\\.txt
+-.* file2\\.txt
+d.* subdir
 
 Empty dir was deleted: Bool.true
-Size before delete_all: \\d+\\w*\\s*test_parent
+Size before delete_all:\\s*\\d+\\w*\\s*test_parent
 
 Parent dir no longer exists: Bool.true
 
@@ -63,8 +63,8 @@ Original content: Original content for Path hard link test
 Link content: Original content for Path hard link test
 Content matches: Bool.true
 Inode information:
-\\d+ -rw-r--r-- \\d+ \\w+ (\\w+ )? *\\d+ \\w+ +\\d+ \\d+:\\d+ test_path_hardlink\\.txt
-\\d+ -rw-r--r-- \\d+ \\w+ (\\w+ )? *\\d+ \\w+ +\\d+ \\d+:\\d+ test_path_original\\.txt
+\\d+ .* test_path_hardlink\\.txt
+\\d+ .* test_path_original\\.txt
 
 First file inode: \\\[\"\\d+\"\\\]
 Second file inode: \\\[\"\\d+\"\\\]
@@ -83,19 +83,19 @@ I ran all Path function tests.
 
 Cleaning up test files...
 Files to clean up:
--rw-r--r-- \\d+ \\w+ \\w+ \\d+ \\w+ +\\d+ \\d+:\\d+ test_path_bytes\\.txt
--rw-r--r-- \\d+ \\w+ \\w+ \\d+ \\w+ +\\d+ \\d+:\\d+ test_path_hardlink\\.txt
--rw-r--r-- \\d+ \\w+ \\w+ \\d+ \\w+ +\\d+ \\d+:\\d+ test_path_json\\.json
--rw-r--r-- \\d+ \\w+ \\w+ \\d+ \\w+ +\\d+ \\d+:\\d+ test_path_original\\.txt
--rw-r--r-- \\d+ \\w+ \\w+ \\d+ \\w+ +\\d+ \\d+:\\d+ test_path_rename_new\\.txt
--rw-r--r-- \\d+ \\w+ \\w+ \\d+ \\w+ +\\d+ \\d+:\\d+ test_path_utf8\\.txt
-
-ls: cannot access .*
-ls: cannot access .*
-ls: cannot access .*
-ls: cannot access .*
-ls: cannot access .*
-ls: cannot access .*
+-.* test_path_bytes\\.txt
+-.* test_path_hardlink\\.txt
+-.* test_path_json\\.json
+-.* test_path_original\\.txt
+-.* test_path_rename_new\\.txt
+-.* test_path_utf8\\.txt
+
+ls: .*
+ls: .*
+ls: .*
+ls: .*
+ls: .*
+ls: .*
 Files deleted successfully: Bool.true
 "]
 
diff --git a/platform/main.roc b/platform/main.roc
index 0d7ed3b1..63846ce0 100644
--- a/platform/main.roc
+++ b/platform/main.roc
@@ -61,7 +61,7 @@ main_for_host! = |raw_args|
 
                 Program exited with error:
 
-                    ❌ ${clean_err_str}
+                ❌ ${clean_err_str}
                 """
 
             _ = Stderr.line!(help_msg)
diff --git a/tests/cmd-test.roc b/tests/cmd-test.roc
index 88209a44..323b70c4 100644
--- a/tests/cmd-test.roc
+++ b/tests/cmd-test.roc
@@ -51,9 +51,9 @@ main! = |_args|
     # Test StdoutContainsInvalidUtf8 - using printf to output invalid UTF-8 bytes
     expect_err(
         Cmd.new("printf")
-        |> Cmd.args(["%b", "\\xff\\xfe"])  # Invalid UTF-8 sequence
+        |> Cmd.args(["\\377\\376"])  # Invalid UTF-8 sequence
         |> Cmd.exec_output!,
-        "(Err (StdoutContainsInvalidUtf8 {cmd_str: \"{ cmd: printf, args: %b \\xff\\xfe }\", err: (BadUtf8 {index: 0, problem: InvalidStartByte})}))"
+        "(Err (StdoutContainsInvalidUtf8 {cmd_str: \"{ cmd: printf, args: \\377\\376 }\", err: (BadUtf8 {index: 0, problem: InvalidStartByte})}))"
     )?
 
     # exec_output_bytes!
diff --git a/tests/file.roc b/tests/file.roc
old mode 100644
new mode 100755
index 953cabd2..0c423da6
--- a/tests/file.roc
+++ b/tests/file.roc
@@ -16,7 +16,7 @@ main! = |_args|
         Ok(_) ->
             cleanup_test_files!(FilesNeedToExist)
         Err(err) ->
-            cleanup_test_files!(FilesMaybeExist)?
+            _ = cleanup_test_files!(FilesMaybeExist)
             Err(Exit(1, "Test run failed:\n\t${Inspect.to_str(err)}"))
 
 run_tests! : {} => Result {} _
diff --git a/tests/path-test.roc b/tests/path-test.roc
old mode 100644
new mode 100755
index cc5d893d..3a2f87c3
--- a/tests/path-test.roc
+++ b/tests/path-test.roc
@@ -16,7 +16,7 @@ main! = |_args|
         Ok(_) ->
             cleanup_test_files!(FilesNeedToExist)
         Err(err) ->
-            cleanup_test_files!(FilesMaybeExist)?
+            _ = cleanup_test_files!(FilesMaybeExist)
             Err(Exit(1, "Test run failed:\n\t${Inspect.to_str(err)}"))
 
 run_tests!: {} => Result {} _
@@ -247,6 +247,21 @@ test_directory_operations! = |{}|
 
     Ok({})
 
+get_hard_link_count! : Str => Result Str _
+get_hard_link_count! = |path_str|
+    ls_l =
+        Cmd.new("ls")
+        |> Cmd.args(["-l", path_str])
+        |> Cmd.exec_output!()?
+
+    hard_link_count_str =
+        (ls_l.stdout_utf8
+        |> Str.split_on(" ")
+        |> List.keep_if(|str| !Str.is_empty(str))
+        |> List.get(1)) ? |_| IExpectedALineWithASpaceHere(ls_l)
+
+    Ok(hard_link_count_str)
+
 test_hard_link! : {} => Result {} _
 test_hard_link! = |{}|
     Stdout.line!("\nTesting Path.hard_link!:")?
@@ -255,15 +270,14 @@ test_hard_link! = |{}|
     original_path = Path.from_str("test_path_original.txt")
     Path.write_utf8!("Original content for Path hard link test", original_path)?
     
-    # Get original file stats
-    stat_before = Cmd.new("stat") |> Cmd.args(["-c", "%h", "test_path_original.txt"]) |> Cmd.exec_output!()?
+    hard_link_count_before = get_hard_link_count!("test_path_original.txt")?
     
     # Create hard link
     link_path = Path.from_str("test_path_hardlink.txt")
     when Path.hard_link!(original_path, link_path) is
         Ok({}) ->
             # Get link count after
-            stat_after = Cmd.new("stat") |> Cmd.args(["-c", "%h", "test_path_original.txt"]) |> Cmd.exec_output!()?
+            hard_link_count_after = get_hard_link_count!("test_path_original.txt")?
 
             # Verify both files exist and have same content
             original_content = Path.read_utf8!(original_path)?
@@ -271,8 +285,8 @@ test_hard_link! = |{}|
             
             Stdout.line!(
                 """
-                Hard link count before: ${Str.trim(stat_before.stdout_utf8)}
-                Hard link count after: ${Str.trim(stat_after.stdout_utf8)}
+                Hard link count before: ${hard_link_count_before}
+                Hard link count after: ${hard_link_count_after}
                 Original content: ${original_content}
                 Link content: ${link_content}
                 Content matches: ${Inspect.to_str(original_content == link_content)}