Advice on how to rework this code to work on a mac operating system!

Good morning,

I have the below script that works perfectly well on a windows machine. However it doesnt run on a Mac Operating system.

Can I get your guidance on what I need to do to the code?

Sub WindowsRenameScript()
'
' RenameScript Macro


Dim xDir As String
Dim xFile As String
Dim xRow As Long
With Application.FileDialog(msoFileDialogFolderPicker)
.AllowMultiSelect = False
If .Show = -1 Then
xDir = .SelectedItems(1)
xFile = Dir(xDir & Application.PathSeparator & "*")
Do Until xFile = ""
xRow = 0
On Error Resume Next
xRow = Application.Match(xFile, Range("A:A"), 0)
If xRow > 0 Then
Name xDir & Application.PathSeparator & xFile As _
xDir & Application.PathSeparator & Cells(xRow, "B").Value
End If
xFile = Dir
Loop
End If
End With
End Sub

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