Just happened to check earlier today, looking to see if the maps have been updated yet being a Thursday, and it didn't indicate an GE update. Just check again after seeing this thread post, and have successfully updated GE. But still no NA map update though.
At least if the checkbox to start GE at start-up was previously cleared, it remains cleared after the update. That's been the case now for an update or two. I don't know how many dozens of updates would result in that box being checked again after the update.
Quoting "The latest version of Garmin Express, including 7.18.0, may still work on these older OSes. However, we will no longer be investigating and resolving any issues that arise in Garmin Express on OSes 8 and older."
Funny
Just happened to check earlier today, looking to see if the maps have been updated yet being a Thursday, and it didn't indicate an GE update. Just check again after seeing this thread post, and have successfully updated GE.
But still no NA map update though. 
Nuvi 2598 | Nuvi 350 | eTrex Vista | eTrex 30x
Release notes
Windows users need this one more than Mac folks
Windows
-Fixed the progress bar going over 100% for certain map updates.
-Made an improvement for handling an exception that could cause Express to freeze on a grey screen.
-Resolved an issue with map updates failing to install to the computer.
-Resolved a server error that could occur for marine chart updates.
-Resolved an exception that could occur when prompting a user to do a restart after a software update.
-Resolved an issue with Express not updating the date and time on a vivosmart 4.
-Other minor bug fixes and improvements.
Mac
-Resolved an issue with music playlists not displaying any songs that were on a device.
-Other minor bugs and improvements.
at least
At least if the checkbox to start GE at start-up was previously cleared, it remains cleared after the update. That's been the case now for an update or two. I don't know how many dozens of updates would result in that box being checked again after the update.
Just dowloaded
Thanks for the heads up. Quick and smooth install
Nuvi 3597 LMT
Thanks
Updated
Updated
Thanks.
Thanks, I guess I needed
Thanks, I guess I needed that.
No more support for MacOS Catalina...
...so I installed Garmin Express 7.20.0.0 on an old ThinkPad running Windows 10.
Ted - Garmin Nuvi 1450 LM
Just checked.... my W7
Just checked.... my W7 system with GE at 7.17.3 --- sees 7.18.4 as an update.....
Glad to see W7 not seeing latest W10 version, but I thought 7.17.3 was last W7.... ??????
A 2689LMT in both our cars that we love... And a 2011 Ford Escape with Nav System that is totally ignored!
Use 7.18.4 at your own risk
Just checked.... my W7 system with GE at 7.17.3 --- sees 7.18.4 as an update.....
Glad to see W7 not seeing latest W10 version, but I thought 7.17.3 was last W7.... ??????
According to the content on the Garmin forum website 7.17.3 is the last supported version. See https://forums.garmin.com/apps-software/mac-windows-software...
Quoting "The latest version of Garmin Express, including 7.18.0, may still work on these older OSes. However, we will no longer be investigating and resolving any issues that arise in Garmin Express on OSes 8 and older."
John from PA
great, thanks for information
great, thanks for information