Paleokid

zip files should unzip in macos using the archive utility that comes within macos. just double click on the .zip file and it should unzip. you should download the file to your desktop and double click it from there. if it still doesn't unzip then i suggest that either the file didn't download correctly in which case you 'should' get an error message or you need to go and run disk utility. to find disk utility, go to applications-utilities-disk utility. on very rare occassions a zip file will simply not open using archive utility so you need another programme - there are some available for free on www.pure-mac.com. hth