diff --git a/src/pcsc.hxx b/src/pcsc.hxx
index 314fa13..8175a20 100644
--- a/src/pcsc.hxx
+++ b/src/pcsc.hxx
@@ -321,6 +321,12 @@ namespace pcsc {
                          fails with SCARD_W_RESET_CARD
                          (0x80100068). */
                 if (_state==SCARD_W_RESET_CARD) { // just resend once
+                  CRYPTOLOG("Mac OS X 10.10 implementation bug: "
+                            "On Mac OSX 10.10 there is a bug in "
+                            "PCSC: After a reconnect, first "
+                            "transaction (SCardTransmit) fails "
+                            "with SCARD_W_RESET_CARD (0x80100068). "
+                            "Retry once.");
                   check(SCardTransmit(_id, &rPci,
                                       (LPCBYTE)in.c_str(),
                                       in.size(),