diff --git a/README.md b/README.md
index 0a8e28c9f..3ee14b0ec 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ test.yaml:5:11: character '\' is invalid for branch and tag names. only special
   |
 5 |       - 'v\d+'
   |           ^~~~
-test.yaml:10:28: label "linux-latest" is unknown. available labels are "windows-latest", "windows-latest-8-cores", "windows-2022", "windows-2019", "ubuntu-latest", "ubuntu-latest-4-cores", "ubuntu-latest-8-cores", "ubuntu-latest-16-cores", "ubuntu-24.04", "ubuntu-22.04", "ubuntu-20.04", "macos-latest", "macos-latest-xl", "macos-latest-xlarge", "macos-latest-large", "macos-14-xl", "macos-14-xlarge", "macos-14-large", "macos-14", "macos-14.0", "macos-13-xl", "macos-13-xlarge", "macos-13-large", "macos-13", "macos-13.0", "macos-12-xl", "macos-12-xlarge", "macos-12-large", "macos-12", "macos-12.0", "self-hosted", "x64", "arm", "arm64", "linux", "macos", "windows". if it is a custom label for self-hosted runner, set list of labels in actionlint.yaml config file [runner-label]
+test.yaml:10:28: label "linux-latest" is unknown. available labels are "windows-latest", "windows-latest-8-cores", "windows-2022", "windows-2019", "ubuntu-latest", "ubuntu-latest-4-cores", "ubuntu-latest-8-cores", "ubuntu-latest-16-cores", "ubuntu-24.04", "ubuntu-22.04", "ubuntu-20.04", "macos-latest", "macos-latest-xl", "macos-latest-xlarge", "macos-latest-large", "macos-15-xlarge", "macos-15-large", "macos-15", "macos-14-xl", "macos-14-xlarge", "macos-14-large", "macos-14", "macos-14.0", "macos-13-xl", "macos-13-xlarge", "macos-13-large", "macos-13", "macos-13.0", "macos-12-xl", "macos-12-xlarge", "macos-12-large", "macos-12", "macos-12.0", "self-hosted", "x64", "arm", "arm64", "linux", "macos", "windows". if it is a custom label for self-hosted runner, set list of labels in actionlint.yaml config file [runner-label]
    |
 10 |         os: [macos-latest, linux-latest]
    |                            ^~~~~~~~~~~~~
diff --git a/rule_runner_label.go b/rule_runner_label.go
index 380f0be8d..96afca3ed 100644
--- a/rule_runner_label.go
+++ b/rule_runner_label.go
@@ -21,6 +21,9 @@ const (
 	compatMacOS140
 	compatMacOS140L
 	compatMacOS140XL
+	compatMacOS150
+	compatMacOS150L
+	compatMacOS150XL
 	compatWindows2019
 	compatWindows2022
 )
@@ -42,6 +45,9 @@ var allGitHubHostedRunnerLabels = []string{
 	"macos-latest-xl",
 	"macos-latest-xlarge",
 	"macos-latest-large",
+	"macos-15-xlarge",
+	"macos-15-large",
+	"macos-15",
 	"macos-14-xl",
 	"macos-14-xlarge",
 	"macos-14-large",
@@ -86,6 +92,9 @@ var defaultRunnerOSCompats = map[string]runnerOSCompat{
 	"macos-latest-xlarge":    compatMacOS140XL,
 	"macos-latest-large":     compatMacOS140L,
 	"macos-latest":           compatMacOS140,
+	"macos-15-xlarge":        compatMacOS150XL,
+	"macos-15-large":         compatMacOS150L,
+	"macos-15":               compatMacOS150,
 	"macos-14-xl":            compatMacOS140XL,
 	"macos-14-xlarge":        compatMacOS140XL,
 	"macos-14-large":         compatMacOS140L,
@@ -106,7 +115,7 @@ var defaultRunnerOSCompats = map[string]runnerOSCompat{
 	"windows-2022":           compatWindows2022,
 	"windows-2019":           compatWindows2019,
 	"linux":                  compatUbuntu2404 | compatUbuntu2204 | compatUbuntu2004, // Note: "linux" does not always indicate Ubuntu. It might be Fedora or Arch or ...
-	"macos":                  compatMacOS140 | compatMacOS140L | compatMacOS140XL | compatMacOS130 | compatMacOS130L | compatMacOS130XL | compatMacOS120 | compatMacOS120L | compatMacOS120XL,
+	"macos":                  compatMacOS150 | compatMacOS150L | compatMacOS150XL | compatMacOS140 | compatMacOS140L | compatMacOS140XL | compatMacOS130 | compatMacOS130L | compatMacOS130XL | compatMacOS120 | compatMacOS120L | compatMacOS120XL,
 	"windows":                compatWindows2022 | compatWindows2019,
 }