Configuring FireDac for cross platform development using Firebird 2.5 - macos

Question

I am creating a cross platform data aware app for windows and os x using Delphi 10.1 Berlin and firebird. My Mac is running El Capitan. My PC is running in Parallels virtual machine on the Mac.
The app on each platform is to connect to a firebird 2.5 server located on a Win 2008 server. The win32 version compiles and connects without a problem. The one for OS X, however, does not.
I have already downloaded and installed FB 2.5 on my Mac and set up PAserver properly. For example, I have been able to connect to firebird on the Windows server from my Mac using RazorSQL. I have also been able to compile a very simple "Hello world" project with just a button and a ShowMessage dialog and run it on the Mac. So, I am sure PAserver is running correctly.
I created a barebones data aware application for testing. Here is the form in text format:
object Form1: TForm1
Left = 0
Top = 0
Caption = 'Form1'
ClientHeight = 480
ClientWidth = 640
FormFactor.Width = 320
FormFactor.Height = 480
FormFactor.Devices = [Desktop]
DesignerMasterStyle = 0
object StringGrid1: TStringGrid
Align = Client
CanFocus = True
ClipChildren = True
Size.Width = 640.000000000000000000
Size.Height = 440.000000000000000000
Size.PlatformDefault = False
TabOrder = 0
RowCount = 0
Viewport.Width = 636.000000000000000000
Viewport.Height = 415.000000000000000000
end
object ToolBar1: TToolBar
Size.Width = 640.000000000000000000
Size.Height = 40.000000000000000000
Size.PlatformDefault = False
TabOrder = 7
object NavigatorBindSourceDB1: TBindNavigator
Position.X = 176.000000000000000000
Position.Y = 7.000000000000000000
Size.Width = 241.000000000000000000
Size.Height = 25.000000000000000000
Size.PlatformDefault = False
TabOrder = 0
DataSource = BindSourceDB1
xRadius = 4.000000000000000000
yRadius = 4.000000000000000000
end
end
object FDConnection1: TFDConnection
Params.Strings = (
'Database=E:\Shared Folders\Employees\Firebird\Databases\Test.fdb'
'User_Name=SYSDBA'
'Password= (intentionally deleted)'
'Protocol=TCPIP'
'Server=afmsasrv'
'Port=3024'
'ExtendedMetadata=True'
'CharacterSet=win1252'
'DriverID=FB25')
Connected = True
LoginPrompt = False
Left = 440
Top = 112
end
object FDGUIxWaitCursor1: TFDGUIxWaitCursor
Provider = 'FMX'
Left = 344
Top = 120
end
object FDTable1: TFDTable
Active = True
IndexFieldNames = 'ID'
Connection = FDConnection1
UpdateOptions.UpdateTableName = 'PERSON'
TableName = 'PERSON'
Left = 272
Top = 128
end
object DataSource1: TDataSource
DataSet = FDTable1
Left = 216
Top = 128
end
object BindSourceDB1: TBindSourceDB
DataSet = FDTable1
ScopeMappings = <>
Left = 304
Top = 224
end
object BindingsList1: TBindingsList
Methods = <>
OutputConverters = <>
Left = 20
Top = 5
object LinkGridToDataSourceBindSourceDB1: TLinkGridToDataSource
Category = 'Quick Bindings'
DataSource = BindSourceDB1
GridControl = StringGrid1
Columns = <>
end
end
end
When I run the project I get the error below:
[FireDAC][Phys]-300. Driver [FB25] is not registered. Correct driver ID or define [FB25] virtual driver in FDDrivers.ini'. Process Project1 (1114)
I have added FDDrivers.ini to my project, as indicated in Embarcadero's FireDac documentation. Here are the contents.
[FDDrivers.ini]
Encoding=UTF8
[FB25]
; FB25 virtual driver will use specified Firebird client library
BaseDriverID=FB
VendorLibWin32=C:\firebird\fb25_W32\bin\fbclient.dll
VendorLibWin64=C:\firebird\fb25_64\bin\fbclient.dll
VendorLibOSX32=/Library/Frameworks/Firebird.framework/Libraries/Versions/A/libfbclient.dylib
Any ideas on how to get this to work?