How To Redownload App Store On Mac. Empty mac app store temporary download cache folder next empty the folder. Open the app store on your mac.
If you can't see your name in the sidebar, click sign in, sign in with your apple id, then click your photo in the sidebar. I'm the developer of an application that is currently on the mac app store. Macworld points out that with the launch of os x mountain lion today, apple has seemingly removed os x lion from the mac app store.
From the top of the window, click purchases.
Click install or download to the right of the item you want to download. Use the buttons next to each app to install, update, or open the app. On your mac, open the app store and then follow these steps. (so that i could install a different version for testing.)