diff --git a/build/moz.configure/pkg.configure b/build/moz.configure/pkg.configure
--- a/build/moz.configure/pkg.configure
+++ b/build/moz.configure/pkg.configure
@@ -12,7 +12,7 @@ def pkg_config(prefixes):
 
 @depends(compile_environment, target)
 def use_pkg_config(compile_environment, target):
-    return compile_environment and target.os not in ("WINNT", "OSX", "Android")
+    return compile_environment and target.os not in ("WINNT", "Android")
 
 
 pkg_config = check_prog(
diff --git a/build/moz.configure/toolchain.configure b/build/moz.configure/toolchain.configure
--- a/build/moz.configure/toolchain.configure
+++ b/build/moz.configure/toolchain.configure
@@ -100,7 +100,7 @@ with only_when(host_is_osx | target_is_osx):
     )
 
     def mac_sdk_min_version():
-        return "14.4"
+        return "13.3"
 
     @depends(
         "--with-macos-sdk",
@@ -1875,7 +1875,7 @@ def select_linker_tmpl(host_or_target):
             die("Unsupported linker " + linker)
 
         # Check the kind of linker
-        version_check = ["-Wl,--version"]
+        version_check = ["-Wl,-ld_classic,--version"]
         cmd_base = c_compiler.wrapper + [c_compiler.compiler] + c_compiler.flags
 
         def try_linker(linker):
@@ -1906,7 +1906,16 @@ def select_linker_tmpl(host_or_target):
                 kind = "ld64"
 
             elif retcode != 0:
-                return None
+                # macOS 15 fallback: try `-Wl,-v` if --version failed
+                if target.kernel == "Darwin":
+                    fallback_cmd = cmd_base + linker_flag + ["-Wl,-v"]
+                    retcode2, stdout2, stderr2 = get_cmd_output(*fallback_cmd, env=env)
+                    if retcode2 == 0 and "@(#)PROGRAM:ld" in stderr2:
+                        kind = "ld64"
+                    else:
+                        return None
+                else:
+                    return None
 
             elif "mold" in stdout:
                 kind = "mold"