HiFavicon 1.5 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This Mac app is a product of Marc Boeren. HiFavicon for Mac is categorized as Developer Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
HiFavicon offers a fast and easy way to create a favicon for your website that looks good on new hi-res Retina displays as well as on regular displays. Drag in a 32x32 icon image and a 16x16 one, then drag out your new favicon.ico into the desired folder.
You may want to check out more Mac applications, such as RAGE Domainer, Multisite for iWeb or konqueror, which might be similar to HiFavicon.