Hi, everyone! Sorry to take up space with something that I assumed I could figure out, but the more I go into everything, the more I'm still unsure. Here is the situation. I have a home recording studio for voice overs. My setup is multiple microphones out of my booth to a Behringer mixer, into a USB port going into my mid-2010 iMac. I have been toying with the idea of trying an Apollo Twin DUO interface, but I see that they have a USB version and a Thunderbolt version. My iMac does not have a Thunderbolt input. Some things that I have researched tells me that Thunderbolt can plug into a USB input but have considerably slower speeds. Other things tell me that I need to go USB. Where the confusion comes in is that USB-C is referred to as Thunderbolt. Apple sells a USB-C to USB adapter that might work, but I'm really looking for some assistance from those of you that actually have the newer equipment. I appreciate the guidance!