Dell Color Laser 1320c with Mac OS 10.15 Catalina: filter error

After upgrading to Mac OS 10.15 Catalina, when trying to print with a Dell Color Laser 1320c the error message appears: Filter failed (in German: Filter fehlgeschlagen).

Headings missing in macOS 10.15 (Catalina)

What happened to the header files after Catalina's update? I receive the error "affirm.h: There is no such file or directory". In Mojave, this problem was resolved using the macOS_SDK_headers_for_macOS_10.14.pkg package. Is there a package for 10.15 or any other solution? Does anyone else face this problem?

iTunes: Progress bar to transfer files to iDevice on macOS 10.15

There used to be a progress bar in iTunes, when transferring files to iDevices (applications with file sharing). However, with the new Finder interface in Catalina, that progress bar cannot be found when copying those files.

Is there any way to verify progress? This is particularly annoying since the transfer of large folders generally fails in the middle.

Import to macOS 10.15 Catalina Apple Music does not work: unknown error -54; probable root cause: file access permissions

Something is wrong with my version of Apple Music after an update to MacOS 10.15 Catalina. Song import fails with the error "File copy failed. An unknown error occurred (-54)".

The problem disappears if I choose Preferences / Files / Copy files to the Music Media folder when adding to the library: No, but it reappears when I choose File / Library / Organize library / Consolidate files.

So this is clearly seen as a problem in relation to file access permissions. I did not change the default values, and p. me Music/iTunes It has "Read and write" just for "I," which seems readable.

Is this a known issue (apparently not known to Google in this particular incarnation at this time) and how can it be fixed? I prefer a "conservative" solution in terms of granting additional access rights.

Updating to MacOS 10.15, it now says that the system is read only

Apple's latest operating system moved all my folders to Security binder. Now all my folders that were in the root can no longer move in the root and give the message: mkdir: myDir: Read-only file system.

That I have to do?

mac os x: Does Mathematica 11 work with MacOS Catalina 10.15?

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[Vn5socks.net] Automatic update 24/7 – Good socks 10:15 PM
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homebrew – brew cask install java6 – Unable to install on volume / because it is disabled – MacOS 10.15 beta

I have uninstalled / reinstalled brew,
turned off macOS Gatekeeper,
csrutil it's off,
and a lot of other things but brew cask install java6 It always results in this:

> $ brew cask install java6                                        ⬡ 8.11.4 [±OLYM-152-optimizely-web-per-banner ✓]
==> Satisfying dependencies
==> Downloading https://support.apple.com/downloads/DL1572/en_US/javaforosx.dmg
Already downloaded: /Users/mmooring/Library/Caches/Homebrew/downloads/ef0dff3db9496248774373eb3eba27a50a91e83edda3fe32d2197db15a5ffc69--javaforosx.dmg
==> Verifying SHA-256 checksum for Cask 'java6'.
==> Installing Cask java6
==> Running installer for java6; your password may be necessary.
==> Package installers may write to any location; options such as --appdir are ignored.
installer: Cannot install on volume / because it is disabled.
installer: A newer version of this package is already installed.
==> Purging files for version 1.6.0_65-b14-468 of Cask java6
Error: Failure while executing; `/usr/bin/sudo -E -- env LOGNAME=mmooring USER=mmooring USERNAME=mmooring /usr/sbin/installer -pkg /usr/local/Caskroom/java6/1.6.0_65-b14-468/JavaForOSX.pkg -target /` exited with 1. Here's the output:
installer: Cannot install on volume / because it is disabled.
installer: A newer version of this package is already installed.
Follow the instructions here:
  https://github.com/Homebrew/homebrew-cask#reporting-bugs
/usr/local/Homebrew/Library/Homebrew/system_command.rb:111:in `assert_success'
/usr/local/Homebrew/Library/Homebrew/system_command.rb:52:in `run!'
/usr/local/Homebrew/Library/Homebrew/system_command.rb:29:in `run'
/usr/local/Homebrew/Library/Homebrew/system_command.rb:33:in `run!'
/usr/local/Homebrew/Library/Homebrew/cask/artifact/pkg.rb:59:in `block in run_installer'
/usr/local/Homebrew/Library/Homebrew/cask/artifact/pkg.rb:65:in `with_choices_file'
/usr/local/Homebrew/Library/Homebrew/cask/artifact/pkg.rb:52:in `run_installer'
/usr/local/Homebrew/Library/Homebrew/cask/artifact/pkg.rb:34:in `install_phase'
/usr/local/Homebrew/Library/Homebrew/cask/installer.rb:214:in `block in install_artifacts'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/set.rb:777:in `each'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/set.rb:777:in `each'
/usr/local/Homebrew/Library/Homebrew/cask/installer.rb:205:in `install_artifacts'
/usr/local/Homebrew/Library/Homebrew/cask/installer.rb:103:in `install'
/usr/local/Homebrew/Library/Homebrew/cask/cmd/install.rb:23:in `block in run'
/usr/local/Homebrew/Library/Homebrew/cask/cmd/install.rb:16:in `each'
/usr/local/Homebrew/Library/Homebrew/cask/cmd/install.rb:16:in `run'
/usr/local/Homebrew/Library/Homebrew/cask/cmd/abstract_command.rb:36:in `run'
/usr/local/Homebrew/Library/Homebrew/cask/cmd.rb:92:in `run_command'
/usr/local/Homebrew/Library/Homebrew/cask/cmd.rb:158:in `run'
/usr/local/Homebrew/Library/Homebrew/cask/cmd.rb:123:in `run'
/usr/local/Homebrew/Library/Homebrew/cmd/cask.rb:9:in `cask'
/usr/local/Homebrew/Library/Homebrew/brew.rb:102:in `
'

I have tried and answered this question from Apple StackExchange:
How to run an application that requires Java SDK on macOS Catalina 10.15?

Any help will be greatly appreciated since I have been blocked for a few days. 🙇🏻‍♂️