diff --git a/build.sh b/build.sh
index 367f5981d..d4009b5a6 100755
--- a/build.sh
+++ b/build.sh
@@ -10,13 +10,25 @@ IOS_MIN_VERSION="15.0"
 IOS="ON"
 SYSTEM_NAME="iOS"
 RUN_BUILD="ON"
+# Dynarec type: "jitless" (default), "jit", or "none"
+DYNAREC_TYPE=${DYNAREC_TYPE:-"jitless"}
+
+# Set JIT flags based on dynarec type
+if [ "$DYNAREC_TYPE" = "jitless" ]; then
+    USE_JIT="OFF"
+    NO_JIT="ON"
+    echo "🔧 Building with JITLESS dynarec"
+else
+    USE_JIT="ON"
+    NO_JIT="OFF"
+    echo "🔧 Building with NO dynarec (interpreter only)"
+fi
 
 # Initialize flags
 C_FLAGS="-arch ${ARCH} \
 -DIOS \
--DTARGET_NO_REC=ON \
--DNO_JIT=ON \
--DUSE_JIT=OFF \
+-DNO_JIT=${NO_JIT} \
+-DUSE_JIT=${USE_JIT} \
 -DTARGET_NO_NIXPROF \
 -miphoneos-version-min=${IOS_MIN_VERSION} \
 -fdata-sections \
@@ -36,10 +48,9 @@ C_FLAGS="-arch ${ARCH} \
 
 CXX_FLAGS="-arch ${ARCH} \
 -DIOS \
--DTARGET_NO_REC=ON \
--DNO_JIT=ON \
+-DNO_JIT=${NO_JIT} \
+-DUSE_JIT=${USE_JIT} \
 -miphoneos-version-min=${IOS_MIN_VERSION} \
--DUSE_JIT=OFF \
 -DTARGET_NO_NIXPROF \
 -fdata-sections \
 -ffast-math \
@@ -171,8 +182,11 @@ CMAKE_CMD="cmake -B ${BUILD_DIR} \
   -DCMAKE_CXX_FLAGS=\"${CXX_FLAGS}\" \
   -DIOS=${IOS} \
   -DCMAKE_SYSTEM_NAME=${SYSTEM_NAME} \
-  -DENABLE_SH4_CACHED_IR=ON \
-  -DNO_JIT=ON \
+  -DENABLE_SH4_CACHED_IR=OFF \
+  -DNO_JIT=${NO_JIT} \
+  -DUSE_JIT=${USE_JIT} \
+  -DENABLE_LTO=ON \
+  -DUSE_LINK_TIME_OPTIMIZATION=ON \
   -DCMAKE_POLICY_VERSION_MINIMUM=3.5"
 
 # Add linker flags if provided
diff --git a/core/cfg/option.cpp b/core/cfg/option.cpp
index eb06c2509..28ad73c70 100644
--- a/core/cfg/option.cpp
+++ b/core/cfg/option.cpp
@@ -24,7 +24,7 @@ namespace config {
 
 // Dynarec
 
-Option<bool> DynarecEnabled("Dynarec.Enabled", true);
+Option<bool> DynarecEnabled("Dynarec.Enabled", false);
 Option<int> Sh4Clock("Sh4Clock", 200);
 
 // General
diff --git a/core/emulator.cpp b/core/emulator.cpp
index 33deed8d5..695fee45f 100644
--- a/core/emulator.cpp
+++ b/core/emulator.cpp
@@ -503,15 +503,15 @@ void Emulator::init()
 	else
 #endif // FEAT_SHREC != DYNAREC_NONE
 	{
-#ifdef ENABLE_SH4_CACHED_IR
-		INFO_LOG(INTERPRETER, "Using new Cached Interpreter");
-		sh4::ir::Get_Sh4Interpreter(&sh4_cpu);
-		sh4_cpu.Init();
-#else
+// #ifdef ENABLE_SH4_CACHED_IR
+// 		INFO_LOG(INTERPRETER, "Using new Cached Interpreter");
+// 		sh4::ir::Get_Sh4Interpreter(&sh4_cpu);
+// 		sh4_cpu.Init();
+// #else
 		Get_Sh4Interpreter(&sh4_cpu);
 		sh4_cpu.Init();
 		INFO_LOG(INTERPRETER, "Using Interpreter");
-#endif // ENABLE_SH4_CACHED_IR
+// #endif // ENABLE_SH4_CACHED_IR
 	}
 
 	state = Init;
@@ -959,13 +959,13 @@ void Emulator::start()
 	else
 #endif // FEAT_SHREC != DYNAREC_NONE
 	{
-#if defined(ENABLE_SH4_CACHED_IR)
-		sh4::ir::Get_Sh4Interpreter(&sh4_cpu);
-		INFO_LOG(DYNAREC, "Using NEW Cached Interpreter");
-#else
+// #if defined(ENABLE_SH4_CACHED_IR)
+// 		sh4::ir::Get_Sh4Interpreter(&sh4_cpu);
+// 		INFO_LOG(DYNAREC, "Using NEW Cached Interpreter");
+// #else
 		Get_Sh4Interpreter(&sh4_cpu);
 		INFO_LOG(DYNAREC, "Using LEGACY Interpreter");
-#endif // ENABLE_SH4_CACHED_IR
+// #endif // ENABLE_SH4_CACHED_IR
 	}
 	setupPtyPipe();
 
diff --git a/core/hw/sh4/dyna/driver.cpp b/core/hw/sh4/dyna/driver.cpp
index eaf4b6eff..842d75943 100644
--- a/core/hw/sh4/dyna/driver.cpp
+++ b/core/hw/sh4/dyna/driver.cpp
@@ -514,11 +514,11 @@ static void recSh4_Reset(bool hard)
 static void recSh4_Init()
 {
 	INFO_LOG(DYNAREC, "recSh4 Init");
-#ifdef ENABLE_SH4_CACHED_IR
-	sh4::ir::Get_Sh4Interpreter(&sh4Interp);
-#else
+// #ifdef ENABLE_SH4_CACHED_IR
+	// sh4::ir::Get_Sh4Interpreter(&sh4Interp);
+// #else
 	Get_Sh4Interpreter(&sh4Interp);
-#endif
+// #endif
 	sh4Interp.Init();
 	bm_Init();
 	
diff --git a/core/hw/sh4/dyna_jitless/driver_jitless.cpp b/core/hw/sh4/dyna_jitless/driver_jitless.cpp
index 00aabb4ad..8770d97ad 100644
--- a/core/hw/sh4/dyna_jitless/driver_jitless.cpp
+++ b/core/hw/sh4/dyna_jitless/driver_jitless.cpp
@@ -970,11 +970,11 @@ static void recSh4_Reset(bool hard)
 static void recSh4_Init()
 {
 	INFO_LOG(DYNAREC, "recSh4 Init");
-#ifdef ENABLE_SH4_CACHED_IR
-	sh4::ir::Get_Sh4Interpreter(&sh4Interp);
-#else
+// #ifdef ENABLE_SH4_CACHED_IR
+	// sh4::ir::Get_Sh4Interpreter(&sh4Interp);
+// #else
 	Get_Sh4Interpreter(&sh4Interp);
-#endif
+// #endif
 	sh4Interp.Init();
 	bm_Init();
 
diff --git a/core/hw/sh4/sh4_if.h b/core/hw/sh4/sh4_if.h
index fd4c2d938..46c52dfb7 100644
--- a/core/hw/sh4/sh4_if.h
+++ b/core/hw/sh4/sh4_if.h
@@ -316,9 +316,9 @@ static inline void sh4_sr_SetFull(u32 value)
 #define sh4rcb (*p_sh4rcb)
 #define Sh4cntx (sh4rcb.cntx)
 
-#ifdef ENABLE_SH4_CACHED_IR
-namespace sh4 { namespace ir { void Get_Sh4Interpreter(sh4_if* cpu); } }
-#endif
+// #ifdef ENABLE_SH4_CACHED_IR
+// namespace sh4 { namespace ir { void Get_Sh4Interpreter(sh4_if* cpu); } }
+// #endif
 
 //Get an interface to sh4 interpreter
 void Get_Sh4Interpreter(sh4_if* cpu);
diff --git a/shell/libretro/option.cpp b/shell/libretro/option.cpp
index 0e2569abd..ddef6696f 100644
--- a/shell/libretro/option.cpp
+++ b/shell/libretro/option.cpp
@@ -23,7 +23,7 @@ namespace config {
 
 // Dynarec
 
-Option<bool> DynarecEnabled("", true);
+Option<bool> DynarecEnabled("", false);
 IntOption Sh4Clock(CORE_OPTION_NAME "_sh4clock", 200);
 
 // General
diff --git a/tests/test.sh b/tests/test.sh
index 4968ff442..fe15c5eb7 100755
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -127,6 +127,7 @@ fi
       -DUSE_JIT=${USE_JIT} \
       -DNO_JIT=${NO_JIT} \
       -DUSE_BREAKPAD=OFF \
+      -DENABLE_SH4_JITLESS=OFF \
       -DTARGET_NO_NIXPROF=ON \
       -DNGGEN_ARM64=$( [ "${ARCH}" = "arm64" ] && echo ON || echo OFF ) \
       -DENABLE_LOG=${ENABLE_LOG} \