You bought a CD, madness.
Slingshot is an open source, low on resources, attractive and free graphical software implemented in Vala and designed to act as an application launcher specifically engineered for the elementary. Subscribe Now:More:to Mac OS X with an iPad requi. Mac OS Gatekeeper must be disabled: In the Finder, locate the app you want to open. Don’t use Launchpad to do this. Launchpad doesn’t allow you to access the shortcut menu. Press the Control key and click the app icon, then choose Open from the shortcut menu.
If you want to upgrade your Mac from Yosemite to another newer OS you have three alternatives..
El Capitan, Sierra and High Sierra are all available for download and are free.
It sounds like you have been trying to install updates to El Capitan downloaded from the Apple Support Downloads pages. If so you need to have already installed El Capitan, that is why you are getting the message about 10.11.
for example if you downloaded the 10.11.6 Combo update this will update any previous version of El Capitan from 10.11.0 to 10.11.5 to the last version 10.11.6. Please remember full versions of OS's are only available via the Mac App Store.
Depending on the age of your Mac you may not be able to upgrade to Sierra or High Sierra, if so you should be able to upgrade to El Capitan.
Have a look at the links below to determine what OS you would like to download. Bear in mind though that if your Mac qualifies for High Sierra then you will be denied the download of El Capitan.
![Slingshot Madness Mac OS Slingshot Madness Mac OS](https://149366088.v2.pressablecdn.com/wp-content/uploads/2011/02/Screenshot1.png)
![Slingshot Madness Mac OS Slingshot Madness Mac OS](https://images.sftcdn.net/images/t_app-cover-l,f_auto/p/0595f020-a4d6-11e6-93b8-00163ec9f5fa/295948473/martian-slingshot-screenshot.png)
The versions that will be downloaded in each case will be the latest versions of each OS, so for El Capitan it will be 10.11.6, Sierra will be 10.12.6 and High Sierra will be 10.13.3.
If you tried Erics link to El Capitan and you couldn't download it, then the App Store is recognising that you Mac qualifies for High Sierra, so you can upgrade to that or if you want you could also upgrade to Sierra from the link above.
Feb 28, 2018 12:24 AM
Android
Slingshot Madness Mac Os Download
If you already have a version of Valkyrie installed, please uninstall it first.
Install the official app using the Google Play Store:
1. Start the official app and wait until the loading is complete (the wait cursor inside the main menu is gone).
2. Enable 'Unknown Sources' under Settings → Security → Unknown Sources. Copy the Valkyrie APK file to your device.
3. Run the valkyrie APK to install. After the install, you will find an app named 'Valkyrie' in your list of apps.
4. Run it. Allow all permissions the app requests. Press the 'Import' button inside the Valkyrie app. The import might take a while. After the import you are able to run the desired game type.
Slingshot Madness Mac Os Catalina
If you get a black screen, please go to app settings and check that storage permissions are on.
Slingshot Madness Mac Os Catalina
If the import fails, make sure you have enough internal storage space available. Each game type requires up to 300 MB. To be extra sure, have 1 GB of free space available.