1 files changed, 39 insertions, 0 deletions
diff --git a/test/fuse_integration/directio_darwin.go b/test/fuse_integration/directio_darwin.go
new file mode 100644
index 000000000..67ccaf9a0
--- /dev/null
+++ b/test/fuse_integration/directio_darwin.go
@@ -0,0 +1,39 @@
+//go:build darwin
+
+package fuse
+
+import (
+	"syscall"
+)
+
+// Direct I/O support for macOS
+
+const (
+	// macOS doesn't have O_DIRECT, but we can use fcntl with F_NOCACHE
+	F_NOCACHE = 48
+)
+
+func openDirectIO(path string, flags int, mode uint32) (int, error) {
+	// Open file normally first
+	fd, err := syscall.Open(path, flags, mode)
+	if err != nil {
+		return -1, err
+	}
+
+	// Set F_NOCACHE to bypass buffer cache (similar to O_DIRECT)
+	_, _, errno := syscall.Syscall(syscall.SYS_FCNTL,
+		uintptr(fd),
+		F_NOCACHE,
+		1) // enable
+
+	if errno != 0 {
+		syscall.Close(fd)
+		return -1, errno
+	}
+
+	return fd, nil
+}
+
+func isDirectIOSupported() bool {
+	return true
+}