System.IO.IOException: Illegal byte sequence : '/Users/runner/actions-runner/cached/_diag/pages/676e42c2-461c-4530-b123-4766243c0f6f_50080aaa-3539-5923-af28-4e459300c4ee_1.log' at System.IO.RandomAccess.WriteAtOffset(SafeFileHandle handle, ReadOnlySpan`1 buffer, Int64 fileOffset) at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder) at GitHub.Runner.Common.PagingLogger.EndPage() at GitHub.Runner.Common.PagingLogger.End() at GitHub.Runner.Worker.ExecutionContext.Complete(Nullable`1 result, String currentOperation, String resultCode) at GitHub.Runner.Worker.JobRunner.CompleteJobAsync(IRunServer runServer, IExecutionContext jobContext, AgentJobRequestMessage message, Nullable`1 taskResult) at GitHub.Runner.Worker.JobRunner.CompleteJobAsync(IRunnerService server, IExecutionContext jobContext, AgentJobRequestMessage message, Nullable`1 taskResult) at GitHub.Runner.Worker.JobRunner.RunAsync(AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken) at GitHub.Runner.Worker.JobRunner.RunAsync(AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken) at GitHub.Runner.Worker.JobRunner.RunAsync(AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken) at GitHub.Runner.Worker.Worker.RunAsync(String pipeIn, String pipeOut) at GitHub.Runner.Worker.Program.MainAsync(IHostContext context, String[] args)

The macos-latest label will migrate to macOS 15 beginning August 4, 2025. For more information see https://github.com/actions/runner-images/issues/12520