Cannot Sign In to Mac App Store - Tried Every Way Possible & No Progress.

yep, this worked for me too- phewww, I've been trying to work this out for months!!

thanks Donalexo and LightspeedMC!

My issue was that I would type in my password and nothing (although an incorrect password would be shown as such).

I went through and tried most of the suggestions posted here. Looking at the consol monitor, I could see that there was some issue with

Store[445]: 445: CFNetwork internal error (0xc01a:/SourceCache/CFNetwork/CFNetwork-596.3.3/Cookies/DiskCookieStorage.cpp: 792)

Did some hunting on the interweb and found the file that it was pointing to. com.apple.appstore.plist located in ~/library/Cookies

To cut a long story short, the directory was read only. Change the permissions to be read/write. Deleted to plist file and allowed me to log in.

To do so, open finder and click on menu option "Go" while holding the alt key down. Select "Library" and located the "Cookie" directory. Select menu "File" -> "Get Info" and change the permission.

I think this was a self inflicted error while trying to stop cookies being written in Safri.

Makeshift James wrote:

Here's how I fixed it:

Open Activity Monitor and kill the process storeagent.

I didn't have any 3rd party apps or anthing either, but this fixed it for me.

I love you! It worked for me too =)

I fixed mine by turning off my anti virus protection. I use the Norton suite and something in there was blocking it. I turned off Norton confidential and firewall but left the antivirus on. Once I turned those two parts off I was able to login just fine.

You may discover that your Mac runs so much better if you uninstall Norton.

Allan

Still no fix for me. I have tried every single suggestion I can find and I still can not update my apps or install Mavericks.

I really wish Apple would address this issue. It is infuriating to me that I can not get free updates.

Worked for me finally, here's what I did (taking into account previous posters, but changing slightly):

1) Quit App Store

2) Go to Activity Monitor (Utilites Folder), and search for "store". You need to Force Quit the following:
A) com.apple.appstore.Plugin..., then select Quit, then select FORCE QUIT
B) storeagent, then select Quit, then select FORCE QUIT

3) Go to Terminal (Utilities Folder), and type:

rm ~/Library/Preferences/com.apple.appstore.plist

press enter

rm ~/Library/Preferences/com.apple.storeagent.plist

press enter

rm -rf ~/Library/Preferences/ByHost/*

press enter

4) Open App Store, you're done!

I appreciate the response but it still does not work for me. I tried it again exactly as you typed it and still can not sign in.

Its the first real issue I had with my Mac and I am disappointed that it does not seem to be addressed anywhere.

I really hope Apple realize there are people out there with this issue and put some effort into solving it with an update that can be installed without entering a password. Until they do I can not spend another dime in the Mac App Store.

Every time I try to download an App from the Mac app store I get this window popping up:

"This Apple ID cannot be used for the Mac App Store."

Any Ideas?

Thanks.

I'm getting the same thing... It just started happening today.

Same thing. Started today an hour ago.

Same thing here... Anyone know how to solve this?

Thank for your suggestion, but it does not work for me.

Same issue here... "This Apple ID cannot be used for the Mac App Store." what the what the?!

Just got off the phone with Apple Support. An iTunes support guy told me the iTunes store is down so that includes the App Store, Mac App Store, and iTunes. The support guy said to try again in 24 hours and that should fix the issue.