It is no different for MAC. The older versions will not change on time. Other than upgrading. I don't know if there is anyway to fix those mac's.
"Not every computer operating system now running is ready for the automatic switch to Daylight Saving Time (DST) when it arrives on March 11th, 2007. Charles Moore at The Low End Mac discussed the situation, another possible "Y2K" scenario, on Friday.
Mac OS X has been patched to account for the new, earlier change over since version 10.4.6. However, anyone using a previous version, or legacy Mac OS will have to make the adjustment manually. "
http://www.macobserver.com/article/2007/01/26.8.shtml
The solution is sooooo simple! Move to Arizona! We stay on Mountain Standard Time all year round! :-)
"Mac OS X has been patched to account for the new, earlier change over since version 10.4.6. However, anyone using a previous version, or legacy Mac OS will have to make the adjustment manually."
Almost correct.
http://docs.info.apple.com/article.html?artnum=305056