When I download the .pkg file to install the game and open it, the installer appears to install: that is, I get the installer completion screen.
Then a rectangular gray window opens and (which I believe is trying to be the Happy Cloud LOTRO Installer Main Screen) immediately crashes. The LOTRO installer icon also appears briefly in my dock and then disappears.
There is a .dmg icon still in my dock but it does nothing when I click on it and disappears when I close the "Installer Completion" window.
The LOTRO installer app is in my app folder and the Happy Cloud icon is in my menu bar. When I double-click on the Installer icon, I get the same gray window for a split second, then it crashes and nothing happens.
In other words, I get the screen on this page: https://lotro-wiki.com/index.php/Mac...d_Installation
with the green check in the center of the window. But I never get the screen to its left on that page with the splash screen and timer, etc. (Sorry I can't paste the images in for some reason.)
Any help would be appreciated. I have dug through all of the technical support link in the sticky and ruled out several problems:
Gatekeeper is not on.
I have repaired all permissions using Disk Utility.
I have rebooted my system to eliminate communication issues.
I am not running any anti-virus or -malware programs.
Time Machine is turned off.
I have wiped files from all previous installations (and failed installations) from Turbine, LOTRO, LOTRO Installer, and Happy Cloud locations.
I have used LOTRO on this very same Mac for 3 years. In fact, my HD failed and I reinstalled LOTRO three days ago, no problem. Then I started receiving a game error, couldn't find anything to remediate the error, and so uninstalled the game and tried to reinstall . . . and now here I am.
I am on an iMac using Mountain Lion 10.8.5
If relevant, here is the game error I was receiving before uninstalling and failing to reinstall: Game Error  The game client was passed invalid command-line parameters. [PlatformStringID_MustRunFromLa uncher]. I believe it occurred while trying to launch the game.