Apple - Java uninstalled but still cannot install java 6 macOS

  • First, try to download listed Java and if that didn't go straightway, use the following script to install it.

Here is a simpler way, an AppleScript that removes the installation limits from Java for macOS 2017-001.

set theDMG to choose file with prompt "Please select javaforosx.dmg:" of type {"dmg"}
do shell script "hdiutil mount " & quoted form of POSIX path of theDMG
do shell script "pkgutil --expand /Volumes/Java\\ for\\ macOS\\ 2017-001/JavaForOSX.pkg ~/tmp"
do shell script "hdiutil unmount /Volumes/Java\\ for\\ macOS\\ 2017-001/"
do shell script "sed -i '' 's/return false/return true/g' ~/tmp/Distribution"
do shell script "pkgutil --flatten ~/tmp ~/Desktop/Java.pkg"
do shell script "rm -rf ~/tmp"
display dialog "Modified Java.pkg saved on desktop" buttons {"Ok"}

The script asks you to select the dmg file, opens the file, unpacks JavaForOSX.pkg, modifies the Distribution file and saves a new pkg file on Desktop, Java.pkg, that can be installed on Catalina.

For those who prefer doing this directly in Terminal:

hdiutil mount /path/to/javaforosx.dmg
pkgutil --expand /Volumes/Java\ for\ macOS\ 2017-001/JavaForOSX.pkg "$t"
hdiutil unmount /Volumes/Java\ for\ macOS\ 2017-001
sed -i '' 's/return false/return true/g' "$t"/Distribution
pkgutil --flatten "$t" ~/Desktop/Java.pkg
rm -rf "$t"
open ~/Desktop/Java.pkg

there is another possibility to make Scilab work on Catalina: install an OpenJDK such the ones available at These JDK will allow Scilab to start on Catalina out of the box, unlike JDK from Oracle which are not AppBundle and JNI aware.