use unix makefiles on macos

Author: coolbreeze413

Makefile

@@ -181,7 +181,7 @@ else ifeq ($(BUILD_PLATFORM),$(filter $(BUILD_PLATFORM),UBUNTU_2004 UBUNTU_2204)
 	-DWITH_ABC=OFF \
 	-S $(SOURCE_DIR) -B $(BUILD_DIR)
 else
-	@cmake \
+	@cmake -G "Unix Makefiles" \
 	-DCMAKE_INSTALL_PREFIX=$(PREFIX) \
 	-DOPENFPGA_WITH_YOSYS=OFF \
 	-DOPENFPGA_WITH_YOSYS_PLUGIN=OFF \