nightly builds (stable)MAC the recent and last ones Crashing

[etcwilliams]

hi, so i posted in another posting that i was testing nightly builds and since it on a mac, its know of the issues listed in how to report a bug read me, so im here know to find out why, nightly builds (stable) the recent and last ones are crashing, like non stop, if i reopen it immedtalty it will crash right away again, but if i wait awhile it will be stable for well random times, the non nightly builds aka the one on the main d/l page is fine, (well expect it does lag and lock up at times, i thought it was my hard drive to i replaced it, or it was mavericks since its on a 2011 mac mini, so i wiped and went back to lion.
well I hope you can help me, thanks and happy valentines day!