"Force Quit" was not working

 I  just had problems with  "Force Quit" was not working.  I could not find any Intellij processes in the 'ps -eaf'. However I did find 2 'php-fpm' processes running that I could not force kill.  Ended up having the shutdown hard (with the power 'key'.) 

I am have the following configuration:

IntelliJ IDEA 2020.2.3 (Ultimate Edition)
Build #IU-202.7660.26, built on October 6, 2020
Licensed to Stuart Schmukler
Subscription is active until February 7, 2021
Runtime version: 11.0.8+10-b944.34 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
macOS 10.15.7
GC: ParNew, ConcurrentMarkSweep
Memory: 1981M
Cores: 8
Non-Bundled Plugins: PHPUnit code coverage, com.alayouni.ansiHighlight, com.intellij.ideolog, com.azoft.json2dart, com.intellij.plugins.emacskeymap, com.intellij.plugins.vscodekeymap, com.jetbrains.plugins.ini4idea, com.xcodersteam.idea.plugins.mkupscss, net.seesharpsoft.intellij.plugins.csv, org.jetbrains.plugins.vagrant, Dart, io.flutter, org.jetbrains.kotlin, com.cybrosis.catdea, org.jgrasp, com.intellij.plugins.html.instantEditing, org.intellij.scala, com.jetbrains.php, com.alicannklc.laravel.snippets, com.aurimasniekis.phpclasstemplates, com.dryabov.phpStorm.phpregexp, com.ferrius.phpStorm.phpattention, com.funivan.idea.phpClean, com.jetbrains.php.blade, de.espend.idea.laravel, com.kalessil.phpStorm.phpInspectionsEA, com.pulyaevskiy.phpstorm.phpdi, com.smartbit8.laravelStorm.intellij, com.wbars.php.folding, de.espend.idea.php.phpunit, dk.lost_world.phpinsights, net.king2500.plugins.PhpAdvancedAutoComplete, ru.vkurdin.idea.php.lambdafolding, org.jetbrains.plugins.phpstorm-remote-interpreter, org.jetbrains.plugins.phpstorm-docker, com.jetbrains.php.phpspec, com.jetbrains.twig, com.oroplatform.idea.oroplatform, de.espend.idea.php.toolbox, de.espend.idea.php.annotation, fr.adrienbrault.idea.symfony2plugin, org.jetbrains.plugins.ruby, Pythonid, com.leinardi.pycharm.pylint, io.github.donkirkby.livepycharm, python-smart-execute, R4Intellij, com.github.nokia.pyvenv, training, org.asciidoctor.intellij.asciidoc, org.jetbrains.plugins.go, com.troyanovsky.idea.CodeHelper, com.ypwang.plugin.go-linter, ru.adelf.idea.dotenv

Where are the logs stored on a Macintosh?

Any ideas on why this happend?

Stuart