Skip ttyname on apple systems

Not relevant there because they don't have a "console session" as
such, and the ttyname call may hang.

Fixes #12506

crates/common/src/lib.rs

@@ -133,6 +133,7 @@ pub struct UnescapeFlags: u32 {
 /// most common operating systems do not use them. The value is cached for the duration of the fish
 /// session. We err on the side of assuming it's not a console session. This approach isn't
 /// bullet-proof and that's OK.
+#[cfg(not(any(target_os = "ios", target_os = "macos")))]
 pub fn is_console_session() -> bool {
     static IS_CONSOLE_SESSION: OnceLock<bool> = OnceLock::new();
     // TODO(terminal-workaround)
@@ -154,6 +155,12 @@ pub fn is_console_session() -> bool {
     })
 }
 
+#[cfg(any(target_os = "ios", target_os = "macos"))]
+pub fn is_console_session() -> bool {
+    // No console session on Apple, and ttyname may hang (#12506).
+    false
+}
+
 /// Exits without invoking destructors (via _exit), useful for code after fork.
 pub fn exit_without_destructors(code: libc::c_int) -> ! {
     unsafe { libc::_exit(code) };