Hi Brad,
This is now listed as a known issue on the resources page where you download firmware, with a link to this article – https://support.allen-heath.com/hc/en-gb/articles/27372432963729-Issues-when-copying-firmware-files-to-a-USB-drive-using-macOS
Which includes more info and the workarounds.
In short, the recent macOS does not truncate and number filenames in a standard way, but it’s possible to rename the file manually before copying to the drive.
Thanks,
Keith.
