Just downloaded
Mac Book Pro OSX 10.10.3

Error message 1.
"Pillars of Eternity.app is damaged and cant be opened. You should move it to the Trash"

Error message 2 with all updates
This patch will not work with your game version

Knew I should have stayed with app store!

Any ideas ... got today free and want to start ....

I don't have a personal Mac, but I'll try and install it on my work Mac and see what happens...

Edit: Whoops! My Mac is running 10.6, so I don't think that will help with the problem you're seeing. Hopefully something in the links below will help or some other person with more OS X experience will be able to help you out.

In the meantime, I found this page that suggests the error message you are seeing is related to OS X's security settings and not the downloaded .app file itself. Maybe this will help?

http://www.tech-recipes.com/rx/45404/mac-downloaded-app-is-damaged-and-cant-be-opened-error-solved/

Edit to add: Here is a post from Apple's site regarding Gatekeeper. I haven't had time to closely read over this page, but I think it is covering similar ground.

https://support.apple.com/en-us/HT202491

Try a fresh download, otherwise. Despite the message the solution to the second problem may work for you.

Who's using a Mac for games ? Drop it ;)

Yeah, I don't understand it. Sure, they're fine for some application games and games made specifically with macs in mind, but, it's been known since about 1993 that if you want to play "PC games", you get a PC. I don't even know: do macs still come with a mouse that only has 1 button? Do they have any sort of graphics cards that are worth a damn? It's silly that game companies try to cater to the mac users after ALL this time that it's been an obvious split between PC and mac useage. Apple/mac computers are good for photo-editing, sound-mixing (some would argue that Final Cut Pro makes macs more viable, too), and graphics work - oh, and using the internet, they're okay for that too. PCs are good for everything and are made for everything, and you can customize your PC to be more inclined for some things over others. Lots of people know, macs are the lay-person's tech device that makes them feel "with the times" but is really just a shiny trinket not good for much that appearing cool to your un-informed friends and you can all make each-other feel hip because you are buying into the trendiness when really it is just a stupid-user-friendly over-priced typing machine. To me, they're really kind of a joke. Just make people switch to PCs if they want to play your games, just like the old times.

Microsoft makes a better product and has better customer service because they have the (diminishing) competition from Apple. It would be better if Apple were stronger and you would be wise not to try to scare people from using them.

Monopolies suck.

The game was designed for Mac and Linux also. These are not just quickie ports from PC. A basic Mac Book Pro is pretty powerful, better than your average PC by far (though the average PC is pretty low on the scale to be honest). They've got more than one mouse button, holy bat quote, who would think they only have one button??? They have graphics chips (and cards on the bigger ones). Anyone who thinks a generic PC is good enough for games but thinks Macs can't compete needs turn off their reality filter. A Mac is just a very high end PC with a more Unix like operating system that can also run Microsoft Office.

OOps I didn"t want to restart this 30-yrs old flamewar, was just kidding ! :)

They used to only have one mouse button, for the longest time, so to me, it is completely sensible to ask that question. I know they have graphics chips (well duh), but, yes, I meant actual graphics cards made for macs that you pay for separately and install manually yourself (I didn't think macs had the capability to change their hardware at all, ever.) Thanks for informing me that they do. Interesting. I never said "a generic PC is good enough for games"..." Macs can't compete." I know hardly anything about macs other than for the longest time they were considered a joke for people who played computer games and that you could hardly get any games for mac and then at some point the mac population started whining that games were made for PC but not mac and so game companies tried to start to cater to them, but most didn't give a shit and the mentality was "if you want to play good computer games, get a PC." I have one friend that has a mac and he (in the past couple years even) used to run this program that would allow him to run windows through his mac OS and when he did that he could then TRY to play PC games that way though most of the time it didn't work/it was too much of a drain on his system to work properly.

A mac is a high end PC? Since when? In what regard? Are you kidding? Just because the mainstream doesn't know much about technology and buys a shitty bogged down PC from best-buy that is 4 years behind "new" when they buy it new, doesn't mean anything in the techy-world.

@drealmer7

You need a new tag line. "balanced one" isn't doing it.

The MAC used to be a high end PC. There was IBM PC and the MAC PC. In our days, not so much. The MAC was great for photoediting, video and anything involving graphics. The PowerMac G5 used to be the standard machine for anyone doing graphics/video, with ATI professional graphic cards incorporated (you know, when ATI did not belong to AMD and had a gaming line and a graphic line for professionals).

In our days, the MAC line is based on Intel processors, so it's vastly irrelevant. Anything a MAC can do, a PC can do it, too, cheaper. A shame, as Apple was one of the processor manufacturers. We used to have three IBM PC developing their own suff (VIA, AMD and Intel), now we have two (Intel/AMD). There were 4 companies developing chipsets (Apple, VIA, AMD, INTEL), now we have two(Intel/AMD). And with things as they are going now, we might end up with the Intel's monopoly.

We used to have Motorola making great chips for Apple. But Intel killed them.

Could you be more specific in why you think so? I think I am probably just being misunderstood in some way (I'm not sure how specifically, so let's try and figure it out) Perhaps you think I'm being harsh about my questioning or that my naivety about macs is a criticism on them? I pretty much was just saying what wolfsrain said and I'm just asking questions to be updated on the status of MACs, really. To me they are really really overpriced and underpowered when compared to PCs, and way way way less versatile, and therefore kind of wasteful and silly and only being successful because of having trendy marketing and putting their money in the right places to influence the right people. But really, I don't want to go back and forth about it, just making my opinion clear and asking for some other perspective on macs from people who know both mac and PC to be able to give me more of an updated comparison.

Also, I was not sure what you meant by:

"Microsoft makes a better product and has better customer service because they have the (diminishing) competition from Apple. It would be better if Apple were stronger and you would be wise not to try to scare people from using them.

Monopolies suck."

but I don't really care to get into the mac vs. PC debate on here, so I dropped it really.

Apple is more a monopoly than anything relating to PCs, IMO. And is a horrible horrible company as far as their practices, ethics, and function in society go.

to answer the original op's question:

i had the same problem when i tried downloading my game files directly from my browser when i first joined gog. the remedy for me was to use gog's downloader app. every downloaded disk image has been fine since. hope that helps.