Problems sync with mail client MAC and dovecot-2.2.10-4.el7_0.1.el7_0.1.x86_64

Hello,

i have installed Centos 7.1.1503 with Dovecot 2.2.10-4.el7_0.1. With Thunderbird all works fine, but when i configure the email client of Mac (Yosemite) with IMAP i can see a error in the log and the client not see the emails:

Oct 9 14:31:34 localhost dovecot: imap(xxxxxxx@xxxxxxx): Fatal: master: service(imap): child 18639 killed with signal 11 (core dumps disabled)

I have read the instructions of http://www.dovecot.org/bugreport.html, but core file is not writing.

Does anyone have this issues? I think that can be a problem in the configuration

Best regards