Don't quit Installer, Safari, System Events and System Preferences.

Casks/blackhole-16ch.rb

@@ -21,9 +21,6 @@ cask "blackhole-16ch" do
                    must_succeed: true
   end
 
-  uninstall quit:    [
-    "com.apple.audio.AudioMIDISetup",
-    "com.apple.systempreferences",
-  ],
+  uninstall quit:    "com.apple.audio.AudioMIDISetup",
             pkgutil: "audio.existential.BlackHole"
 end

Casks/blackhole-2ch.rb

@@ -21,9 +21,6 @@ cask "blackhole-2ch" do
                    must_succeed: true
   end
 
-  uninstall quit:    [
-    "com.apple.audio.AudioMIDISetup",
-    "com.apple.systempreferences",
-  ],
+  uninstall quit:    "com.apple.audio.AudioMIDISetup",
             pkgutil: "audio.existential.BlackHole"
 end

Casks/emclient.rb

@@ -18,8 +18,7 @@ cask "emclient" do
 
   pkg "setup.pkg"
 
-  uninstall quit:    "application.com.apple.Safari.12886706636",
-            pkgutil: "com.emclient.mail.client.pkg"
+  uninstall pkgutil: "com.emclient.mail.client.pkg"
 
   zap trash: [
     "~/Library/Caches/com.emclient.mail.client",

Casks/odrive.rb

@@ -1,6 +1,6 @@
 cask "odrive" do
-  version "6918"
-  sha256 "9107f7634ac70cf017c889738b5bd8e3ac937bd991d5999119832d57407f0c22"
+  version "6931"
+  sha256 "2014d431480e849eaf1f941e893d3214c30bd86a913b8c1e84dedc572637abaa"
 
   url "https://d3huse1s6vwzq6.cloudfront.net/odrivesync.#{version}.pkg",
       verified: "d3huse1s6vwzq6.cloudfront.net/"
@@ -18,8 +18,6 @@ cask "odrive" do
 
   uninstall quit:    [
     "com.oxygencloud.odrive",
-    "application.com.apple.installer.1152921500312163482",
-    "application.com.apple.systemevents.1152921500312199658",
   ],
             pkgutil: "com.oxygen.odrive.*"
 end

Casks/snip.rb

@@ -18,8 +18,6 @@ cask "snip" do
 
   uninstall quit:    [
     "com.tencent.snip",
-    "com.apple.systemevents",
-    "com.apple.systempreferences",
   ],
             pkgutil: "com.tencent.snip.Snip.pkg"
 end

cmd/lib/check.rb

@@ -48,6 +48,9 @@ module Check
         system_command!("/bin/launchctl", args: ["list"], print_stderr: false, sudo: sudo)
           .stdout
           .lines.drop(1)
+          .reject do |id|
+            id.match?(/\A(?:application\.)?com\.apple\.(installer|Safari|systemevents|systempreferences)(?:\.|$)/)
+          end
       end
 
       [false, true]