Since there are no known mac OSX viruses out there, you are safe to use LW on a macbook as many others including moderators on this forum do. For help with LW on macs, check the mac sections of this forum, most notably Installation > OSX & General OSX sections, "if" you have problems or if you wish to find out information.

However, LW on OSX does use a lot of RAM & VM (Virtual Memory), so you are wise to have 500 MB or more ram & more than 10 GB free space on your OSX system hard disk drive. Also make sure your Java is up to date; Updating software on Mac OSX