Can't boot into Mageia with usb stick on iMac

Hello everyone!
New user to the linux world, have always tried many distros but always have ended up back into the Apple ecosystem which I am a huge fan of, especially macOS. But now I have decided to move for real and I have been distro hopping a little bit, started with elementaryOS, now at opensuse leap which will be discontinued in the future, so I am looking elsewhere and really like Mageia, but the installtion process seem pretty complicated.
My device; iMac (2017 I think)
intel core i5-7360U CPU @2.30 Hz
intel irus plus graphics 640
I have a 125GB usb stick, fully formatted it to fat32 and used dd to burn the iso into my usb stick. Then i restarted and when I try to boot into mageia by pressing the option key (how you do it in a mac), I don't see my usb stick/drive listed (can only see default EFI which has opensuse right now), I don't understand why this isn't working. First time I used Unetbootin, which I later figured it isn't supported, but then I re-did the whole thing and used dd, why is it not working now??
Please help, been with this for hours, any help asap would be appreciated. Keep in mind I am still a inexperienced user to the linux world, so please explain it to me as I am a 5 year old.
New user to the linux world, have always tried many distros but always have ended up back into the Apple ecosystem which I am a huge fan of, especially macOS. But now I have decided to move for real and I have been distro hopping a little bit, started with elementaryOS, now at opensuse leap which will be discontinued in the future, so I am looking elsewhere and really like Mageia, but the installtion process seem pretty complicated.
My device; iMac (2017 I think)
intel core i5-7360U CPU @2.30 Hz
intel irus plus graphics 640
I have a 125GB usb stick, fully formatted it to fat32 and used dd to burn the iso into my usb stick. Then i restarted and when I try to boot into mageia by pressing the option key (how you do it in a mac), I don't see my usb stick/drive listed (can only see default EFI which has opensuse right now), I don't understand why this isn't working. First time I used Unetbootin, which I later figured it isn't supported, but then I re-did the whole thing and used dd, why is it not working now??
Please help, been with this for hours, any help asap would be appreciated. Keep in mind I am still a inexperienced user to the linux world, so please explain it to me as I am a 5 year old.