The fact that it’s a Java-based app is not the real problem (as long as you have the latest version on Java installed on your Mac). The real problem is that macOS 10.15 Catalina has very strict security and privacy settings (compared to any previous version of macOS, OSX or MacOSX).
I would like to know which version of Java I have installed on my Mac, since the software I want to use will only run on Java 7 or higher.
How can I check (and update) ?
Java is a free software platform which is operation system independent (so Mac & PC) created and maintained by Oracle. Despite it always having been a very reliable way of making cross platform games & applications, Apple has restricted the use of Java to ‘only when needed’ by default in the latest versions of OSX and macOS, because of the security risks involved in using Java and similar software that can run autonomously on your Mac next to macOS.
To find out which version of Java you have installed, do the online check that’s on this official website :
Just follow the instructions given and the result of the check will be shown : you will either have the latest version installed, or you won’t… in that case update instructions will guide you to getting the latest version available for your Mac.
My children would like to play Minecraft on their Macs, but they have managed OSX user accounts with Parental Controls turned on. After downloading Minecraft from the Mojang website, I can do the usual install by drag&drop, but when double-clicking the Minecraft-app, I get an error message saying that if I am trying to run Minecraft from the .dmg, I should first move it to the Applications folder. I am trying to run it from within the Applications folder however…
Is there any way to fix this ?
Yes there is, but since OSX 10.11 El_Capitan is keeping Java out of view (and away from use and install), the solution is different from the one that used to work before. [see previous post on this subject]
Here’s how to install Minecraft 1.9 (and newer ?) on a managed user account in OSX 10.11 El_Capitan :
login to OSX using the restricted user account
go to Mojang.com
login using your eMail-address (not your username) and your password
download the MacOSX-version there
after downloading, open the .dmg file by double-clicking on it
as instructed, drag the Minecraft-icon onto the Applications-folder-icon next to it to install
then, open the System Preferences and click on Parental Controls
when asked, login with your administrator’s name & password
in the window that opens, select the restricted user’s name from the list at the left
then click the “Apps”-tab and make sure there’s a checkmark at “Limit Applications on this Mac” and type “minecraft” in the Search field
then put a checkmark in front of all Minecraft-apps that are listed ; which might be “minecraft” and/or “Minecraft Launcher” (if no Minecraft apps are listed, skip this step)
then click the “Web”-tab and make sure there’s a checkmark at “try to limit access to adult websites” and click the “Customize…”-button
in the window that opens, at “always allow access to these websites:”, click the PlusSign-button and enter these websites :