[macOS] Update free space test condition to 14 GB (actions#10546)

images/macos/scripts/tests/System.Tests.ps1

@@ -3,11 +3,12 @@ Import-Module "$PSScriptRoot/../helpers/Common.Helpers.psm1"
 $os = Get-OSVersion
 
 Describe "Disk free space" {
-    It "Image has more than 10GB free space" {
-        # we should have at least 10 GB of free space on macOS images
-        # https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops#capabilities-and-limitations
+    It "Image has more than 14GB free space" {
+        # we should have at least 14 GB of free space on macOS images
+        # 10GB here: https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops#capabilities-and-limitations
+        # 14GB here: https://docs.github.com/en/actions/using-github-hosted-runners/using-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
         $freeSpace = (Get-PSDrive "/").Free
-        $freeSpace | Should -BeGreaterOrEqual 10GB
+        $freeSpace | Should -BeGreaterOrEqual 14GB
     }
 }