I find it usually pays to wait until the .1 version appears which has given time to iron out many of the bugs. Caution: This article is longish and may depress those who have already upgraded. http://www.gizmodo.co.uk/2014/11/the-worst-bugs-in-os-x-yosemite-and-how-to-fix-them/ Cheers ** To leave the list, click on the immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=unsubscribe] ** If this link doesn't work then send a message to: ** access-uk-request@xxxxxxxxxxxxx ** and in the Subject line type ** unsubscribe ** For other list commands such as vacation mode, click on the ** immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=faq] ** or send a message, to ** access-uk-request@xxxxxxxxxxxxx with the Subject:- faq