I can only strongly recommend not to format the SD card for use in the camera on a Mac or PC. A lot of write failures that I hear from in the Fuji and Sony context (including freezing of the camera itself) have been traced back to SD cards that were not formatted in camera.
Telling us, that you ran into a full SD card and are only now creating a backup of it, shows me that you use the card to actually keep the photos permanently on the card.
I can only plead you not to do that. SD card failures are quite common. Almost every photographer that I know, had a failure eventually. There is a reason after all, that especially wedding photographers always demand 2 card slots in their cameras, just to have a backup if the main card dies during a session.
See this research of SD cards failing by Tony Northrup: https://www.youtube.com/watch?v=qqo-MtNy2Ps
Best practice is to copy all files from the card to you hard-drive as soon as possible and then reformat in camera, making sure the card is good to go and in the exact format that your camera likes.
SD cards are cheap, but photos and the connected memories are precious.