There are many alternatives to Mac Linux USB Loader for Mac if you are looking for a replacement. The best Mac alternative is balenaEtcher, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Mac Linux USB Loader and four of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Mac Linux USB Loader are UNetbootin (Free, Open Source), Deepin Boot Maker (Free, Open Source) and DiskMaker X (Free).
DiskMaker X (formerly Lion DiskMaker) is an application built with AppleScript that you can use with many versions of OS X/macOS to build a bootable drive from OS X/macOS installer program (the one you download from the App Store).