Got "APP is not verified" Error on Macs Joshua Chang October 15, 2018 03:41 Go to https://www.tiertime.com/downloads/software/, find the LKD File for MAC V x.x.x.x. Open UP Studio, choose Activate, and then load the LKD file. Related articles Where to download the Mac Version 2.4 UP studio and how to activate it? How to activate the printer Why Mac Vers.2.4 UP Studio Show "Please Activate" all the time? How to solve non-Administrator users cannot operate the software in a domain/school network? Software Interface Comments 0 comments Please sign in to leave a comment.