diff --git a/src/raspberrypi/disks/cfilesystem.cpp b/src/raspberrypi/disks/cfilesystem.cpp
index 6efe1d0..357ab50 100644
--- a/src/raspberrypi/disks/cfilesystem.cpp
+++ b/src/raspberrypi/disks/cfilesystem.cpp
@@ -76,6 +76,7 @@ static void convert(char const *src, char const *dest,
 	const char *inbuf, char *outbuf, size_t outsize)
 #endif
 {
+#ifndef __APPLE__
 	iconv_t cd;
 	size_t in;
 	size_t out;
@@ -97,6 +98,7 @@ static void convert(char const *src, char const *dest,
 
 	iconv_close(cd);
 	*outbuf = '\0';
+#endif //ifndef __macintosh__
 }
 #else
 // Newlibの中にiconvが含まれてなかったので無変換
@@ -4548,7 +4550,7 @@ int CFileSys::Ioctrl(DWORD nUnit, DWORD nFunction, Human68k::ioctrl_t* pIoctrl)
 
 		case 2:
 			switch (pIoctrl->param) {
-				case -1:
+				case (DWORD)-1:
 					// メディア再認識
 					m_cEntry.isMediaOffline(nUnit);
 					return 0;
@@ -4560,17 +4562,17 @@ int CFileSys::Ioctrl(DWORD nUnit, DWORD nFunction, Human68k::ioctrl_t* pIoctrl)
 			}
 			break;
 
-		case -1:
+		case (DWORD)-1:
 			// 常駐判定
 			memcpy(pIoctrl->buffer, "WindrvXM", 8);
 			return 0;
 
-		case -2:
+		case (DWORD)-2:
 			// オプション設定
 			SetOption(pIoctrl->param);
 			return 0;
 
-		case -3:
+		case (DWORD)-3:
 			// オプション獲得
 			pIoctrl->param = GetOption();
 			return 0;
diff --git a/src/raspberrypi/disks/scsi_host_bridge.cpp b/src/raspberrypi/disks/scsi_host_bridge.cpp
index c0e0a12..520c5c4 100644
--- a/src/raspberrypi/disks/scsi_host_bridge.cpp
+++ b/src/raspberrypi/disks/scsi_host_bridge.cpp
@@ -37,7 +37,7 @@ SCSIBR::SCSIBR() : Disk()
 	// Host Bridge
 	disk.id = MAKEID('S', 'C', 'B', 'R');
 
-#if defined(RASCSI) && !defined(BAREMETAL)
+#if defined(RASCSI) && defined(__linux__) && !defined(BAREMETAL)
 	// TAP Driver Generation
 	tap = new CTapDriver();
 	m_bTapEnable = tap->Init();
@@ -1307,7 +1307,7 @@ void FASTCALL SCSIBR::FS_Ioctrl(BYTE *buf)
 
 	switch (nFunction) {
 		case 2:
-		case -2:
+		case (DWORD)-2:
 			pIoctrl->param = htonl(pIoctrl->param);
 			break;
 	}
@@ -1319,7 +1319,7 @@ void FASTCALL SCSIBR::FS_Ioctrl(BYTE *buf)
 			pIoctrl->media = htons(pIoctrl->media);
 			break;
 		case 1:
-		case -3:
+		case (DWORD)-3:
 			pIoctrl->param = htonl(pIoctrl->param);
 			break;
 	}