Java App Wont Start Mac Os
Dec 23, 2013 I can no longer use Java Web Start on my Macbook running Max OSX 10.7.5 and java version 1.6.037. When I attempt to launch a Java Web Start file, I get a popup that says: To open this Web Start application, you need to download the Java Runtime Environment. Click 'More Info.' To visit the website for the Java Runtime Environment.
Check compatibility
- Still, Mac Stuck when installing macOS Mojave 10.14 update, then try to put Mac into safe mode and update. In safe mode, Mac will disable all the third-party applications and only keep the system applications. Step #1: Shut down the Mac by holding the Power button. Don’t release the Power button, until the Mac turns off.
- Apr 15, 2020 How to Install Software from Unsigned Developers on a Mac. This wikiHow teaches you how to install software that isn't approved by Apple on your Mac. MacOS Sierra marks most unofficial apps as unsigned software, so you'll need to perform.
You can upgrade to OS Yosemite on any of the following Mac models. Your Mac also needs at least 2GB of memory and 8GB of available storage space.
MacBook introduced in 2009 or later, plus MacBook (13-inch, Aluminum, Late 2008)
MacBook Air introduced in late 2008 or later
MacBook Pro introduced in mid 2007 or later
Mac mini introduced in early 2009 or later
iMac introduced in mid 2007 or later
Mac Pro introduced in early 2008 or later
Xserve models introduced in early 2009
To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . If your Mac isn't compatible with OS X Yosemite, the installer will let you know.
Make a backup
Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.
Get connected
It takes time to download and install OS X, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download OS X Yosemite
For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of macOS.
If you still need OS X Yosemite, use this link: Download OS X Yosemite. A file named InstallMacOSX.dmg will download to your Mac.
Install the macOS installer
Double-click the downloaded file to open a window showing its contents. Then double-click the file within, named InstallMacOSX.pkg.
Follow the onscreen instructions, which will guide you through the steps necessary to install.
Begin installation
Java App Wont Start Mac Os 10
After installation of the installer is complete, open the Applications folder on your Mac, then double-click the file named Install OS X Yosemite.
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
Allow installation to complete
Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both OS X and related updates to your Mac firmware.
Learn more
- OS X Yosemite won't install on top of a later version of macOS, but you can erase your disk first or install on another disk.
- You can use macOS Recovery to reinstall macOS.
It’s no secret that there have been some issues within the last few years between the folks at Apple, and the folks at Oracle, who now own the rights to the Java language and software engines. Due to several security concerns, Apple, along with several other developers, have adjusted their approach to running Java apps and applets in order to protect consumers from potentially-dangerous code being run on their machines. On paper, this sounds like a good strategy to ensure the safety of user information.
But what if you legitimately have a need to run a Java app? There are so many different versions of Java Runtime Engines (also known as JRE, or the environment in which Java code is executed on an operating system) that finding the right combination can be tricky. Once you *do* find the correct version (or versions), security concerns such as the ones previously mentioned may still keep these apps from performing properly.
One way Java apps are distributed is called Java Web Start (see here for more information on this technology). These are small files that are downloaded and executed, as opposed to embedded code within a webpage. By default on several operating systems, including Apple’s OS X, these files are not executed automatically, which means they act as a regular download that must be double-clicked (or Command-O, for the keyboard fanatics out there like me) in order to run. While this isn’t a complete roadblock, it does diminish the convenience factor. Thankfully, there’s a way to get these programs to run automatically as they are downloaded, using Apples wonderful Automater tool. Here’s how:
Note: The screenshots in this document are tailored towards Apples most-recent version of OS X, Yosemite. If you are on an older version of OS X, the pictures and steps may not match up perfectly.
Clear cache mac os. Manually clearing caches can be time consuming and repetitive. In Safari, you will need to look in Privacy section while in Chrome, you can find this in Chrome’s settings. To clear cache on macOS Mojave you can easily use third-party software. It is highly technical process.
- From your Macintosh system, launch the Automater tool. This can be done by selecting it from the Launchpad, typing “Automater” into the Spotlight search field, or simply locating the icon in your Applications Folder.
- When Automater opens up, you can click “New Document” to create a blank document. This will open up the New Document wizard.
- We will be creating what is called a Folder Action workflow, so click to highlight the “Folder Action” icon, and then click the Choose button. A folder action workflow will perform a task any time the folder being monitored receives new files or folders within it.
- First, we need to specify the folder we want to perform this action on. Normally, this will be the “Downloads” folder, since this is where the downloaded Java Web Start files will be placed by default. From the drop-down in the upper right, select “Other…” and browse to the Downloads folder. Once that folder is opened, click the Choose button, and the drop-down should now read “Downloads”.
- Now we need to tell the workflow what action to perform. In the left-hand column, listed under “Library” are all the categories of actions we can choose from. Select “Utilities”, and all the utilities will come up in the next column. From that middle column, drag-and-drop “Run Shell Script” to the workflow column on the right, and it will add it as a step.
- Next, we need to configure the Shell Script action a little. Next to the “Shell:” dropdown, make sure the value is set to “/bin/bash” so that the BASH shell is used to execute the script. Then, on the right-hand side next to “Pass input:”, make sure it reads “as arguments”.
- Lastly, we need to input the shell script in question, as the default value of “cat” will not do what we need to do. Copy and paste the contents of the text box below into the shell script window. This script will search for any Java Web Start files (*.jnlp), and if it finds any, it will run the Java Web Start engine on them, and then delete them (so your downloads folder doesn’t get cluttered up).
- Once this is done, you can now save your Automater workflow from the File menu, or hit Command-S. I have titled mine “Java WebStart Downloads.workflow” so that i can easily find it in the coming steps.
- One last step is to activate the workflow for the downloads folder. Open up a Finder window, and go to your home folder by either selecting it from the Go menu in the menu bar, or hitting Command-Shift-H on your keyboard. This will allow you to see the Downloads folder in the Finder window itself, instead of just on the sidebar.
Java App Wont Start Mac Os Download
- Perform a secondary click (also known as a right-click) on the Downloads folder and select “Services”, and then “Folder Action Setup”. This brings up the Folder Actions Setup window.
- From the list of available actions, select your workflow, “Java WebStart Downloads.workflow” in my case, and click Attach. You will now see your Downloads folder in the lefthand column (with checkmark checked), and your workflow in the righthand column (also with checkmark checked). That’s it. Your Java Web Start documents will now automatically open, and then be removed.
Now, whenever a .jnlp file is downloaded or otherwise placed in your Downloads folder, Automater will run (you will see a spinning gear in the top right of the menu bar). Once the Jawa Web Start file is finished, the gear will go away.
Note: The script used in this example is specifically designed for opening .jnlp files, however it can be easily adjusted to perform roughly any task on any type of file. This, however, is outside of the scope of this post.
While you’re at it, check out some of these sites for more Automator workflow ideas.
Run Java On Mac
- (Please note, the following sites are not affiliated with Byteworks)