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“Your video is processing” preventing ad publishing in Meta Ads Manager

When trying to boost an Instagram Reel via Meta Business Suite, the Publish button may be grayed out. In the Ad preview area (where your reel should play), you’ll see the message: Your video is processing. You ll see a preview Continue reading

Is it still possible to use an old 30-inch Apple Cinema Display with modern Macs?

Yes — Apple Cinema Displays from the 2000s (the aluminum ones with massive DVI cables) are still perfectly usable with modern Macs from the 2020s via USB-C. However, for the 30-inch model, you’ll need a slightly clunkier cable setup. The Continue reading

A trick to change card currency in PayPal when there’s no “Update” button

In PayPal, if you d like to change card currency setting but the Change button is missing: The trick is to append /update-currency/ to the page URL and hit Enter.

Accusys Gamma Carry 8 RAID 0 vs. RAID 5 read/write speed performance

Accusys Gamma Carry 8 connected to a MacBook Pro via Thunderbolt 3.Hard drives: 8 × Western Digital 18TB WD Ultrastar DC HC550 WUH721818AL4206.Benchmarking software: Blackmagic Disk Speed Test running on macOS Sonoma. Array type Top write speed, MB/s Top read speed, Continue reading

How to change the order of your names on Facebook today?

This blog is a collection of my technical notes from working with information systems, not intended for the general public. However, Facebook’s user interface has become so convoluted that even simple tasks require a bit of technical knowledge and patience. Continue reading

A trick to prevent Cyberduck from asking for a client certificate on macOS

Problem: Cyberduck on macOS will repeatedly prompt you to present a client certificate when making an FTP-SSL connection to certain servers (e.g. Synology). This issue arises if your macOS Keychain contains at least one personal certificate. If the server connection Continue reading

Authentik: set custom username for OAuth application (e.g. for Apache Guacamole) via a property mapping

If you use Authentik (https://goauthentik.io/) as an OAuth authentication provider for your Apache Guacamole (https://guacamole.apache.org/) instance and you d like to customize usernames for Guacamole, here s how you can achieve this. The steps described below may work for other applications, wired Continue reading

Guacamole 1.4: “Creation of WebSocket tunnel to guacd failed”

Problem: Guacamole 1.4 shows internal error when making any connection and in /var/log/tomcat9/catalina.out you see something like: Possible explanation: This is due to IPv4 vs. IPv6 differences - depending on the version of Linux, guacd may listen on IPv6 by Continue reading

Guacamole 1.4: “Log in failed” for RDP connections

Problem (Guacamole 1.4 while connecting to an RDP server): and in logs: Possible explanation: Simpler, but unsafe solution: For a proper solution, see Bob s comment below.

Serving acme-challenges from two web-servers sharing the same domain via nginx

Say you have nginx listening on port 80 and sharing a domain with another web-server (e.g. Proxmox web-server) that is listening on a different port, and you want to route HTTP-01 ( acme-challenge ) requests to that second web-server. It s doable via Continue reading