Hello, fellow MacLovers! New to MacRumor's forums, so let me introduce myself... I am a tech freak and can't survive without it. I could spend days and nights on end trying to fix a device or get it to work the way I want it to. I suppose you could say I enjoy a challenge. I was always familiar using the iProducts (iPod, iPhone, iPad) but I just recently got into using OS X with my recently purchased MacBook Pro Retina 15" 4 months ago. I am here frequently to find info on what I need and I usually can make it through without having to post anything but this problem has had me stumped for a few months. I Google up and down, left and right but can't find what I need. I'm on and off with it hoping that I will bump into another solution down the road by chance. I have been trying VERY hard to get this going AT ALL to no avail... now I am posting on this forum, hoping I can find my answers. I have been trying to get one of my 1st Gen ATV to run OS X Tiger (10.4, X86) so that I could use it as my download manager and such because I do not want to put the strain on my beautiful MBPR. I completely understand all the steps required on all the online tutorials I have read and I have tried everything I could try: - I have even bought a USB to IDE reader to try to just do it directly to the HDD of the ATV - I tried to use Disk Utility to make a bootable USB install of OS X Tiger but it won't even let me select the ISO - Somehow, with a 3rd Party app, I managed to copy the ISO over to a USB and made it bootable... but it won't boot on my MBPR - I can't just run the install from the mounted ISO and try to install it directly to the HDD connected with the USB-IDE cable - I also found a tutorial that used Terminal commands and followed that but it didn't help I am utterly out of gas and I can't find any ways around anything... I'm running OS X Yosemite (10.10), MacBook Pro (Retina, 15-inch, Mid 2014) The OS X Tiger install is Intel compatible and is just an ISO from a torrent download I have found The USB I am using has 8 GB or I even have 32 GB ones to spare The HDD is a 60 GB OEM directly from the Apple TV, itself Hopefully, this is enough information to give to help anyone help me find a solution. Maybe, I'm not doing enough research or I am looking in the wrong corners... but I am not about to give up!