If you have a Windows system, check your USb stick with RMPrepUSB - Quick Size Test button (will destroy existing data).
I don't know about third party apps, but here is how i made a USB boot out of a *.DMG. Install iATKOS L2 (Lion 10.7.2) from USB using only Windows Posted.IATKOS ML2 (Mac OS X Mountain Lion 10.8.2).torrent - DOWNLOAD (Mirror #1).If not, then you have a faulty dmg image file.
3- Make sure that the md5 checksum of your iATKOS dmg file matches the one posted on our website. Simply, if a hardware that is not compatible for OSX86 10.7.2, then it is also not compatible for iATKOS L2. Simple and all-in-one OSX86 installation for basic and compatible hardware is the aim of iATKOS project. These installers are used for installing OSX86 systems on personal computers. Generated by PCPartPicker 18:35 EST-0500: Catalina Mojave High Sierra Sierra Yosemite Mavericks Mountain Lion Lion Snow Leopard Tiger All.