Create Ubuntu usb drive on GPT

I’m trying to make a USB with ubuntu on it be bootable from Macs. I have made a working usb drive partitioned MBR, it boots on my laptop but not on Macs. I predict that the problem is that the usb drive is mbr. Googling on how to change the partition to gpt I found out that usb drives cant to become gpt partitioned. If anyone knows how to make it gpt, It would be amazing.

My current solution is to buy soled state usb drives, but they’re expensive and I need multiple drives that run on mac.