qdoc's parser can't parse an enum value that contains a comma. See \enum QSysInfo::MacVersion, where several values contain a comma:

MV_IOS_4_3 = Q_MV_IOS(4, 3),
MV_IOS_5_0 = Q_MV_IOS(5, 0),
MV_IOS_5_1 = Q_MV_IOS(5, 1),
MV_IOS_6_0 = Q_MV_IOS(6, 0),
MV_IOS_6_1 = Q_MV_IOS(6, 1),
MV_IOS_7_0 = Q_MV_IOS(7, 0),
MV_IOS_7_1 = Q_MV_IOS(7, 1),
MV_IOS_8_0 = Q_MV_IOS(8, 0)

qdoc gets lost and reports there is no documentation for those values, when, in fact, the documentation is there.