Many of Galaxy S II buyers who got their Mac OSx upgraded to the latest one (Lion), reported that Kies is not compatible with it.
Actually I was facing same problem and I got to know a way to fix this.
To tackle this, you can install an older version and then update it to the latest version. I have tested it works for this version: KiesMac_22.214.171.12455_7. Install it and then go to “Preference”->”Update” and update to the latest version
This a guranteed way to make Kies work on Mac OS Lion.
Give it a try!!
W?th th? Galaxy S update t? Gingerbread fresh ?n ??r minds, th? manufacturer ?? wasting n? time ?n bringing th??r original superphone up t? th? latest version ?f Android, 2.3.4. A leak ?f th? n?w Gingerbread build dating fr?m June 3rd h?? b??n uncovered f?r th? Galaxy S I9000, even ?f th? actual update ????? still b? a ways ?ff.
Samsung made good on its word to fight back against Apple’s lawsuit, which accused the Korean electronics giant of copying the look and feel of the iPhone and iPad, by filing several patent infringement lawsuits against Apple in Seoul, Tokyo and Germany on Friday.