System.IO.IOException on MacOS pwsh #5225

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### Environment
PSReadLine: 2.4.5
PowerShell: 7.6.8
OS: macOS 26.7.1
BufferWidth: 80
BufferHeight: 24

Last 0 Keys:



### Exception

System.IO.IOException: The system cannot open the device or file specified. : 'PSReadLineHistoryFile_3549844812'. One or more system calls failed: lstat("", ...) == -1; errno == ENOENT;
   at System.Threading.Mutex.CreateMutexCore(Boolean initiallyOwned, String name, NamedWaitHandleOptionsInternal options, Boolean& createdNew)
   at System.Threading.Mutex..ctor(Boolean initiallyOwned, String name)
   at Microsoft.PowerShell.PSConsoleReadLine.DelayedOneTimeInitialize()
   at Microsoft.PowerShell.PSConsoleReadLine.Initialize(Runspace runspace, EngineIntrinsics engineIntrinsics)
   at Microsoft.PowerShell.PSConsoleReadLine.ReadLine(Runspace runspace, EngineIntrinsics engineIntrinsics, CancellationToken cancellationToken, Nullable`1 lastRunStatus)

PS Version: 7.6.8
PS HostName: ConsoleHost
PSReadLine Version: 
PSReadLine EditMode: Emacs
OS: Darwin dm-XXXXX 25.6.0 Darwin Kernel Version 25.6.0: Tue Aug 18 17:49:53 PDT 2026; root:xnu-12377.161.15.700.19~2/RELEASE_ARM64_T6030 arm64
BufferWidth: 114
BufferHeight: 59