diff --git a/backend/pixma/pixma_bjnp.c b/backend/pixma/pixma_bjnp.c
index 34ba918f2..fd41d5e96 100644
--- a/backend/pixma/pixma_bjnp.c
+++ b/backend/pixma/pixma_bjnp.c
@@ -109,6 +109,13 @@
 #ifndef SSIZE_MAX
 # define SSIZE_MAX      LONG_MAX
 #endif
+#ifndef HOST_NAME_MAX
+# ifdef _POSIX_HOST_NAME_MAX
+#  define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
+# else
+#  define HOST_NAME_MAX 255
+# endif
+#endif
 
 /* static data */
 static bjnp_device_t device[BJNP_NO_DEVICES];
diff --git a/sanei/sanei_usb.c b/sanei/sanei_usb.c
index fc8afda4d..8e8185a8f 100644
--- a/sanei/sanei_usb.c
+++ b/sanei/sanei_usb.c
@@ -1859,6 +1859,11 @@ static void libusb_scan_devices(void)
 	  continue;
 	}
 
+/* macOS won't configure several USB scanners (i.e. ScanSnap 300M) because their
+ * descriptors are vendor specific.  As a result the device will get configured
+ * later during sanei_usb_open making it safe to ignore the configuration check
+ * here on these platforms. */
+#if !defined(__APPLE__)
       if (config == 0)
 	{
 	  DBG (1,
@@ -1866,6 +1871,7 @@ static void libusb_scan_devices(void)
 	       vid, pid, busno, address);
 	  continue;
 	}
+#endif
 
       ret = libusb_get_config_descriptor (dev, 0, &config0);
       if (ret < 0)
@@ -2614,11 +2620,17 @@ sanei_usb_open (SANE_String_Const devname, SANE_Int * dn)
 	  return SANE_STATUS_INVAL;
 	}
 
+/* macOS won't configure several USB scanners (i.e. ScanSnap 300M) because their
+ * descriptors are vendor specific.  As a result the device will get configured
+ * later during sanei_usb_open making it safe to ignore the configuration check
+ * here on these platforms. */
+#if !defined(__APPLE__)
       if (config == 0)
 	{
 	  DBG (1, "sanei_usb_open: device `%s' not configured?\n", devname);
 	  return SANE_STATUS_INVAL;
 	}
+#endif
 
       result = libusb_get_device_descriptor (dev, &desc);
       if (result < 0)