Started creating a MacroRepository + tests and pretty much have it working for basic data but realized Morten has already done this before so will commit this work and see what I can find from the previous code.

src/Umbraco.Core/Persistence/Mappers/MacroMapper.cs

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+using System.Collections.Concurrent;
+using Umbraco.Core.Models;
+using Umbraco.Core.Models.Rdbms;
+
+namespace Umbraco.Core.Persistence.Mappers
+{
+    [MapperFor(typeof(Macro))]
+    internal sealed class MacroMapper : BaseMapper
+    {
+        private static readonly ConcurrentDictionary<string, DtoMapModel> PropertyInfoCacheInstance = new ConcurrentDictionary<string, DtoMapModel>();
+
+        //NOTE: its an internal class but the ctor must be public since we're using Activator.CreateInstance to create it
+        // otherwise that would fail because there is no public constructor.
+        public MacroMapper()
+        {
+            BuildMap();
+        }
+
+        #region Overrides of BaseMapper
+
+        internal override ConcurrentDictionary<string, DtoMapModel> PropertyInfoCache
+        {
+            get { return PropertyInfoCacheInstance; }
+        }
+
+        internal override void BuildMap()
+        {
+            CacheMap<Macro, MacroDto>(src => src.Id, dto => dto.Id);
+            CacheMap<Macro, MacroDto>(src => src.Alias, dto => dto.Alias);
+            CacheMap<Macro, MacroDto>(src => src.CacheByPage, dto => dto.CacheByPage);
+            CacheMap<Macro, MacroDto>(src => src.CachePersonalized, dto => dto.CachePersonalized);
+            CacheMap<Macro, MacroDto>(src => src.ControlAssembly, dto => dto.ScriptAssembly);
+            CacheMap<Macro, MacroDto>(src => src.ControlType, dto => dto.ScriptType);
+            CacheMap<Macro, MacroDto>(src => src.DontRender, dto => dto.DontRender);
+            CacheMap<Macro, MacroDto>(src => src.Name, dto => dto.Name);
+            CacheMap<Macro, MacroDto>(src => src.RefreshRate, dto => dto.RefreshRate);
+            CacheMap<Macro, MacroDto>(src => src.ScriptPath, dto => dto.Python);
+            CacheMap<Macro, MacroDto>(src => src.UseInEditor, dto => dto.UseInEditor);
+            CacheMap<Macro, MacroDto>(src => src.XsltPath, dto => dto.Xslt);
+        }
+
+        #endregion
+    }
+}