Always install metal on apple.

gpt4all-chat/CMakeLists.txt

@@ -175,14 +175,14 @@ install(TARGETS llamamodel-230519-avxonly DESTINATION lib COMPONENT ${COMPONENT_
 install(TARGETS llamamodel-230519-default DESTINATION lib COMPONENT ${COMPONENT_NAME_MAIN})
 install(TARGETS llamamodel-mainline-avxonly DESTINATION lib COMPONENT ${COMPONENT_NAME_MAIN})
 install(TARGETS llamamodel-mainline-default DESTINATION lib COMPONENT ${COMPONENT_NAME_MAIN})
-if (LLAMA_METAL)
+if(APPLE)
 install(TARGETS llamamodel-mainline-metal DESTINATION lib COMPONENT ${COMPONENT_NAME_MAIN})
 endif()
 install(TARGETS mpt-avxonly DESTINATION lib COMPONENT ${COMPONENT_NAME_MAIN})
 install(TARGETS mpt-default DESTINATION lib COMPONENT ${COMPONENT_NAME_MAIN})
 install(TARGETS replit-mainline-avxonly DESTINATION lib COMPONENT ${COMPONENT_NAME_MAIN})
 install(TARGETS replit-mainline-default DESTINATION lib COMPONENT ${COMPONENT_NAME_MAIN})
-if (LLAMA_METAL)
+if(APPLE)
 install(TARGETS replit-mainline-metal DESTINATION lib COMPONENT ${COMPONENT_NAME_MAIN})
 endif()