I can't upgrade Flash Player because it wasn't downloaded from the Mac App Store.

Now what?? I can't watch any videos.

Go to Control Panel > Security > Allow Software from App Store and Indentified Developers, then run the installer again.

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""Install Adobe Flash Player.app" can't be opened because... not downloaded from the Mac App Store"

I jsut upgraded to 10.9 and it is up to date and also my safari is up to date (no updates available for it). My safari is saying that my flash is out of date. when I follow the links it lets me download but when I double click to install it tell me "“Install Adobe Flash Player.app” can’t be opened because it was not downloaded from the Mac App Store.". When I install the flash UNinstaller and try to install that, it tells me the same. I ALSO found the exact same problem when I tried to install the acrobat installer (some tried to download a pdf and the page told me that my acrobat reader 'might' be out of date). Any thought?

You're running up against the GateKeeper.
Download the offline installer: Flash Player 12.0.0.44 (Mac OS X) by right clicking and choosing "Download Linked File As".
Mount the DMG and when it opens, right click the installer and choose "Open".
You'll see a warning. Click "Open" again.
It will run from there.

I get the message "Install Adobe Flash" can't be opened because it was not downloaded from the Mac App Store. This is the first time I have gotten the message. What do I need to do?

I get the message "Install Adobe Flash" can't be opened because it was not downloaded from the Mac App Store. This is the first time I have gotten the message. What do I need to do?

Hi Sandra,
you'll need to edit the security settings to install programs 'Mac App Store and identified developers'
Open the Systems Preference and go to Security & Privacy. There will be a section in the 'General' tab for 'Allow apps downloaded from:" The default selection is 'Mac App Store'. Change this setting to 'Mac App Store and identified developers".
This screenshot is taken on OS X 10.10 (Yosemite), so it may look slightly different if you're on a different OS X version.
Maria

This message appears whenever I try to open a file downloaded from internet: can't be opened because it was not downloaded from the Mac App Store

Just bought a new Imac OX 10.9. Installed contents from previous Time Machine. All looks good. But, now, when I try to open any file downloaded from interent (like the Amazon mp3 downloader, for example or a plugin update) I get this message:
"XXX can’t be opened because it was not downloaded from the Mac App Store" . Help! Thanks

Got it solved! System preferences, security & privacy icon, general: allow apps downloaded from Mac Store and Identified developers! Phew!

Can't download from the Mac app store

Hi,
I was wondering if anyone else is having this issue. Anytime I try to download an app free or paid from the mac app store it goes to my doc but it doesn't download it just sits there and says it's waiting. also when I have an update for an app I click on it and enter my apple id and pass to update and nothing happends. the store worked when I first got it and then one day it just stopped.
how can I fix this? Do i have to reinstall the app store? I am running the latest version of snow leopard on a core i7 macbook Pro (early 2010) I also checked my firewall settings and nothing is blocking it from working.
Thanks

Then I would first try trashing these files and folder;
~/Library/Preferences/com.apple.appstore.plist
~/Library/Preferences/com.apple.storeagent.plist
~/Library/Preferences/ByHost

Computer will not allow me to install software, like Adobe updates, because they were not downloaded from the Apple App store

Two times now, I've tried to download and install something (Adobe flash-player up-date AND DIRECTV so I can watch TV channels on my computer) and each time I get a caution symbol and it says that the software cannot be opened by Safari BECAUSE it was not from the App Store. What do I need to be able to install these apps?

Barry Hemphill,
Close! System preferences>Security & Privacy>General tab:
Clinton

I'm running10.8.5. I have tried to install a programme but can't because it is from an unidentified developer. the box says-Your security preferences allow installation of only apps from the Mac App Store and identified developers.how do i install the pro

i'm running10.8.5. I have tried to install a programme but can't because it is from an unidentified developer. the box says-Your security preferences allow installation of only apps from the Mac App Store and identified developers.how do i install the programme

macjack gave you the easiest solution. Need to have admin privilieges to change this option.

Why do I get a "can't import spreadsheet because it was created with an unsupported application version" alert when the updated version was purchased direct from the Mac App Store? The spreadsheet is now lost somewhere!

Why do I get a "can't import spreadsheet because it was created with an unsupported application version" alert when the updated version was purchased direct from the Mac App Store? The spreadsheet is now lost somewhere!

Pages 4.3 should still be in an iWorks folder within your Applications folder.
http://www.apple.com/feedback/pages.html

I'm trying to download adobe indesign but i'm getting a message that's saying "Install.app" can't be opened because it is from an unidentified developer. Your security preferences allow installation of only apps from the Mac App Store and identified devel

I recently purchased adobe indesign I'm trying to download it but i'm getting a message that's saying “Install.app” can’t be opened because it is from an unidentified developer. Your security preferences allow installation of only apps from the Mac App Store and identified developers.

System Preferences / Security & Privacy / General tab.
Change the settings at the bottom half of the window.

When Lion officially comes out from the Mac App Store, I understand that I can just buy it from there. However, will the laptops have Lion automatically? Or does it come with Snow leopard still.

When Lion officially comes out from the Mac App Store, I understand that I can just buy it from there. However, will the laptops have Lion automatically? Or does it come with Snow leopard still.

The ones sold that day will come with Snow Leopard most likely but they will be able to get a free upgrade to LIon if they apply within 30 days. Hardware coming through the supply chain from the day of the announcement will have Lion installed so it depends what stock people have to move before buyers see those.

How can I delete a app from the Mac App Store completely?

I have a apllication which had a error. I delete it and download the app from the Mac App Store again, but the error wasn't delete. My iMac had stored it and the Error wasn't deleted so I can't youse the app.
What can I do to delete the app complete?
Please answer.

If your App was faulty in some way you should write to iTunes support. If you simply want to delete it, most Apps carry uninstall (not delete) instructions.
Incidentally, I believe you cannot delete the record of your purchase from iTunes. That will always stay on your purchases list and be marked with a dark grey square as INSTALL..

Can't buy an App from the mac app store with iTunes gift card.

Hello ,
I have iTunes credit over 10 $ but still i can't buy an App from the mac App store although it show that i have credit and im sure i do, i tried exiting the Mac App Store and try again but still when i click on buy it opens a new window with billing info after i type my Account details, i don't use credit card and have always redeemed iTunes Gift Cards , but now it doesn't let me buy it!
Any help on how to buy an App without the store taking me to billing info to add , would be appreciated
I have a Macbook Air 2013 Model.
with Yosemite installed.
Thanks,

Yes.
Click Redeem on the right side of the MAS window under Quick Links.
Carolyn

I downloaded a widget from apple and was unable to open it because a window appeared telling me that the developer was unidentified. How do I change the security preferences that allow me to only install apps from the Mac App Store?

I downloaded a widget from apple and was unable to open it because a window appeared telling me that the developer was unidentified. How do I change the security preferences that allow me to only install apps from the Mac App Store?

go to system preferences - security and privacy - under allow applications downloaded from - click on anywhere.

Can you purchase an app from the mac app store with an itunes gift card

Can you purchase an app from the mac app store with an itunes gift card and if so how.

Yes.
Click Redeem on the right side of the MAS window under Quick Links.
Carolyn

Can I install an app from the mac app store on just my login?

I'd like to download apps from the mac app store to just my login and NOT have them installed on other users logins. how can I do this?

In your Mac, you have two Applications folder: /Applications, and ~/Applications.
The first one is the used by default and it stores the applications that are going to be used by all users. The second one is stored in your user folder (~ refers to the user folder), and you have to put the apps you only want to use yourself in this app.
First, open Finder, select Applications folder in the sidebar and copy all the apps you want, selecting them with Command key and then, pressing Command and C keys. After that, select Go menu > Go to Folder, type ~/Applications, and press Command and V keys there to paste your applications.
Finally, go back to /Applications and delete the copied apps, so only you will be able to access to those applications

I can't upgrade Flash Player because it wasn't downloaded from the Mac App Store.

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