My application of Dr Java was working until I got the last sofware update on my MacBook Pro. Now when I try to run the application the computer sais it is from an unknown provider, I press run it anyway and the computer sais it is a damaged file and cant be opened.
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This is a continuing saga from Apple. It has happened several times in the
past decade. Apple wants to lock down Macs so that no software other than
what Apple licenses (for a fee) can run on their machines. My recollection
is that there was a workaround involving the security manager, which may
still work and should be accessible in the support logs at the DrJava
sourceforge website, Unfortunately, I don't remember the details. I
presume that you have installed a Java 8 JDK or JRE and that you are trying
to run the jar file from the command line using the command
java -jar drjava.jar
In the early noughts, MacOS X was my favorite development machine because
it supported Unix (Mach modulo some minor nits) and was consumer friendly.
I quit using Macs in the 2006-2007 timeframe when Apple failed to provide a
32-bit version of Java 6 (even though the prototype "release" was 32-bit).
When I could no longer run Java 6 (the prototype release was withdrawn) on
my dual core 32-bit Mac (still under Applecare!), I abandoned using Macs
forever. Many months later after Apple dropped support for Java, Oracle
finally produced a 32-bit version that worked but my research group had
already dumped our MacBooks for PCs running Linux or in a few cases
Windows + Cygwin. Many Computer Science faculty members across the US
still use Macs but if Microsoft can ever get WSL (Windows Subsystem for
Linux) to work transparently and completely (e.g. support GUI apps without
dropping the firewall and engaging in crufty workarounds), I will strongly
advise Computer Science students to avoid Apple altogether and use Windows
10/WSL. I now use a combination of Windows 10 and Linux 18.04/20.04
running on separate laptops. I try to keep all of my important files on a
USB key (movable between machines) which is a pain but it generally works.
My application of Dr Java was working until I got the last sofware update
on my MacBook Pro. Now when I try to run the application the computer sais
it is from an unknown provider, I press run it anyway and the computer sais
it is a damaged file and cant be opened.
Just taking a stab at this since you said it is new.. you probably need to install Java 8.
Go to https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html and click the link for MacOS x64. If that isn't the issue, please provide further information.
My application of Dr Java was working until I got the last sofware update on my MacBook Pro. Now when I try to run the application the computer sais it is from an unknown provider, I press run it anyway and the computer sais it is a damaged file and cant be opened.
This is a continuing saga from Apple. It has happened several times in the
past decade. Apple wants to lock down Macs so that no software other than
what Apple licenses (for a fee) can run on their machines. My recollection
is that there was a workaround involving the security manager, which may
still work and should be accessible in the support logs at the DrJava
sourceforge website, Unfortunately, I don't remember the details. I
presume that you have installed a Java 8 JDK or JRE and that you are trying
to run the jar file from the command line using the command
java -jar drjava.jar
In the early noughts, MacOS X was my favorite development machine because
it supported Unix (Mach modulo some minor nits) and was consumer friendly.
I quit using Macs in the 2006-2007 timeframe when Apple failed to provide a
32-bit version of Java 6 (even though the prototype "release" was 32-bit).
When I could no longer run Java 6 (the prototype release was withdrawn) on
my dual core 32-bit Mac (still under Applecare!), I abandoned using Macs
forever. Many months later after Apple dropped support for Java, Oracle
finally produced a 32-bit version that worked but my research group had
already dumped our MacBooks for PCs running Linux or in a few cases
Windows + Cygwin. Many Computer Science faculty members across the US
still use Macs but if Microsoft can ever get WSL (Windows Subsystem for
Linux) to work transparently and completely (e.g. support GUI apps without
dropping the firewall and engaging in crufty workarounds), I will strongly
advise Computer Science students to avoid Apple altogether and use Windows
10/WSL. I now use a combination of Windows 10 and Linux 18.04/20.04
running on separate laptops. I try to keep all of my important files on a
USB key (movable between machines) which is a pain but it generally works.
I no longer even guest access to a Mac machine.
On Tue, Dec 15, 2020 at 1:45 PM Pablo Fondevila Zanuy mrfondevila@users.sourceforge.net wrote:
Related
Support Requests: #363