Assuming patchstick is on /dev/disk1

VERIFY #'s MATCH gpt show /dev/disk1 for start and size
should probably save output of gpt show in case you need to recreate it
-b is start
-s is size

Make it AppleTV mountable
gpt remove -i 1 /dev/disk1
gpt add -b 34 -s 1994318 -t 5265636F-7665-11AA-AA11-00306543ECAC /dev/disk1

Make it OSX mountable
gpt remove -i 1 /dev/disk1
gpt add -b 34 -s 1994318 -t 48465300-0000-11AA-AA11-00306543ECAC /dev/disk1