I've got to give my computer (mid 2012 MBP, 15", running OSX 10.10) to a repair shop (not Apple store, but Apple authorised) for them to replace the battery.
My concern is that someone at the repair shop could either access data on my drive or install something malicious.
I've got FileVault enabled and a secure password to log in to the machine, is there any further steps I could take (short of removing the HD prior to giving it to them)?