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Mac is fine. If you followed the instructions as described, but your TV does not recognize the USB drive or the files there, then you will need to format the USB drive as NTFS file format which is mostly used by Windows.
You can format the USB drive to Windows format, but you then need to install the NTFS drivers since Mac doesn't support writing to NTFS drives.
You can follow the instructions on this video:
Alternative way would be to go to someone with Windows computer so that you can transfer the files to NTFS formatted drive which the TV will recognize.