milanstevanovic

Using a Serbian ID Card (MUP RS) for Digital Signing on macOS

A guide for using the qualified electronic certificate on a Serbian ID card (lična karta) on macOS — including signing documents for APR and authenticating on government portals like eUprava and ePorezi.

⚠️ MUP does not officially support macOS. This guide uses open-source tools created by Nikola Ubavić as a replacement for the Windows-only TrustEdgeID middleware.

Tested on: Apple Silicon (M3) + macOS Sequoia 15.x, April 2026.

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sharadhr

$HOME, Not So Sweet $HOME

• Preface
• 1 What is $HOME to you?
• 2 Setup
  • 2.1 Linux
    • 2.1.1 $HOME
    • 2.1.2 Dot-files and dot-directories
    • 2.1.3 XDG Base Directories
• 2.1.4 xdg-user-dirs

dpapathanasiou

Based on the Host communication instructions, but with a tweak for when the usb0 address is not found:

$ /sbin/ip link set usb0 up
Cannot find device "usb0"

Because of the predictable network interface name scheme, though, usb0 may be renamed to something else: