Got the same problem.

KhajitFurTrader wrote: »

Patch 1.4.6 hit today on the EU server (yesterday on US).

is that expected to break the launcher?

Syntse wrote: »

Seems to have broken launcher for many... try following

http://forums.elderscrollsonline.com/discussion/79631/100-fixed-tested-zenimaxs-solution-to-patch-fix-gm-posted-error-209/p1

if it doesn't help then might be that you really need to install

I can't find the mentioned files on my Mac - is it PC specific?

Ok, so I started the launcher this evening to download the patch. It started downloading right away (live & PTS), the PLAY button was changed to PAUSE. After it finished with live (button changed back to PLAY), I just let it sit on the desktop to continue downloading the PTS update. Live stayed being selected (highlighted).

After a while, the "Error 209 - PatchManifestError_VersionFail" error message popped up all of a sudden. PLAY button changed to REPAIR. So I clicked repair, and let it do its thing (checksumming/comparing). It went through it quickly and smoothly, could be that it downloaded something again very fast, and when it finished, PLAY was displayed again. So I started the client, it reported version 1.4.6.1065271. I could login, everything was peachy-keen. Logout, launcher continued with the PTS.

Then Error 209 popped up again. Sigh. Funny thing is, clicking PLAY (yeah, it stayed that way) launches the client regardless of the error message.

I suspect it's something on the CDN side. The launcher keeps a connection to the CDN open (mine just happened to connect to the host 06-80-46-186-compute-ag2-ash01.opsourcecloud.net, which might or might not be a different domain/provider than in the past, I can't remember). Maybe it get's asked periodically about the client's version and the data on the CDN side the local version gets compared to is off.

The client continues to work just fine.

The databuild.stamp file in /Applications/ZeniMax Online/The Elder Scrolls Online EU/depot/_databuild reports

0.win.0.live.1065271
2014/10/11:01:20:15
1.4.6

which seems to be in order.

Update: PTS download has finished, and the launcher hasn't displayed the error message again in the meantime.

Have the same problem, and I didn't have the launcher open. Looks like they may have nerfed the Mac client for good. Or is the only option a complete reinstall ? If so, how do you do a clean uninstall ?

Although, it didn't work - the launcher still says install, I can still launch the game from the exe file.
- is there any way I can expect the software I have bought and the service I subscribe to to be working any time soon, or should I just content myself with paying for nothing?
- Could someone who works for the money I pay try and help out, say if this is to be expected or what not? Am I to download 25 gb every day, and keep 60 gb free on my HD at all times also?

Don't mean to be rude but this is getting ridiculous and it has been like this since launch - practically every time a minor or major patch hits I have to re-download the entire game...

Jitterbug,
At least you have done a service to the community by letting the rest of us know that reinstalling does not fix the problem, which strongly suggests that the problem is on their end, not ours.