I upgraded from Quicken 2015 for Mac to Quicken 2018 for Mac in May of 2018. This has been bothering me for almost a year and a half. Just getting around to this.
I have portfolios in 3 locations; LPL, TD Ameritrade and First Commonwealth. I know there is an issue with First Commonwealth due to their website configuration, but I would think that LPL and TD Ameritrade should sync. First Com is a bank and their website requires going to their home page, then pulling down a menu to get to their investment division and logging in from there.
As for the info in About Quicken- Release : Version 5.14.2 (Build 514.31850.100) Valid until May 4, 2020 I'm running MacOS Mojave v10.14.6