diff --git a/src/os/mac/macho/MachO.go b/src/os/mac/macho/MachO.go
index d4fc05b..41b47ce 100644
--- a/src/os/mac/macho/MachO.go
+++ b/src/os/mac/macho/MachO.go
@@ -52,8 +52,9 @@ func (m *MachO) Write(writer io.Writer) {
 		InitProt:     0,
 	})
 
-	codeStart := 32 + m.Header.SizeCommands
-	codeEnd := uint64(codeStart) + uint64(len(m.Code))
+	codeStart := uint64(32 + m.Header.SizeCommands)
+	codeLength := uint64(len(m.Code))
+	codeEnd := codeStart + codeLength
 	dataPadding := elf.Padding(codeEnd, 4096)
 	dataStart := codeEnd + dataPadding
 
@@ -61,13 +62,13 @@ func (m *MachO) Write(writer io.Writer) {
 		LoadCommand:  LcSegment64,
 		Length:       0x48,
 		Name:         [16]byte{'_', '_', 'T', 'E', 'X', 'T'},
-		Address:      config.BaseAddress,
-		SizeInMemory: codeEnd,
+		Address:      config.BaseAddress + codeStart,
+		SizeInMemory: codeLength,
 		Offset:       0,
-		SizeInFile:   codeEnd,
+		SizeInFile:   codeLength,
 		NumSections:  0,
 		Flag:         0,
-		MaxProt:      ProtReadable | ProtWritable | ProtExecutable,
+		MaxProt:      ProtReadable | ProtExecutable,
 		InitProt:     ProtReadable | ProtExecutable,
 	})