Default Servo live rendering to hardware on macOS

crates/ely_app/src/services/servo_live.rs

@@ -7,10 +7,8 @@ use std::{
 
 /// Environment variable that lets the user pick the rendering context
 /// kind used by the spawned sidecar. Accepted values: `software`
-/// and `hardware`. The default stays on the software context because
-/// the live sidecar talks to the app over stdio; the hardware path
-/// requires a transport that moves the IOSurface mach send right into
-/// the receiver process.
+/// and `hardware`. macOS defaults to the hardware path and receives
+/// IOSurface mach send rights over a side Mach channel.
 use ely_domain::SitePermissionDecision;
 use serde::Serialize;
 use thiserror::Error;

crates/ely_app/src/services/servo_sidecar_command.rs

@@ -139,8 +139,12 @@ fn rendering_context_selection(raw: Option<&str>) -> SidecarRenderingContext {
 }
 
 fn default_rendering_context() -> SidecarRenderingContext {
+    if cfg!(target_os = "macos") {
+        SidecarRenderingContext::Hardware
+    } else {
         SidecarRenderingContext::Software
     }
+}
 
 fn workspace_target_sidecar_path(manifest_path: &Path) -> Option<PathBuf> {
     let profile = if cfg!(debug_assertions) { "debug" } else { "release" };
@@ -176,8 +180,16 @@ mod tests {
         assert_eq!(context.sidecar_features(), SOFTWARE_SIDECAR_FEATURES);
     }
 
+    #[cfg(target_os = "macos")]
     #[test]
-    fn defaults_to_software_rendering_context() {
+    fn defaults_to_hardware_rendering_context_on_macos() {
+        assert_eq!(rendering_context_selection(None), SidecarRenderingContext::Hardware);
+        assert_eq!(rendering_context_selection(Some("garbage")), SidecarRenderingContext::Hardware);
+    }
+
+    #[cfg(not(target_os = "macos"))]
+    #[test]
+    fn defaults_to_software_rendering_context_off_macos() {
         assert_eq!(rendering_context_selection(None), SidecarRenderingContext::Software);
         assert_eq!(rendering_context_selection(Some("garbage")), SidecarRenderingContext::Software);
     }