February 2026 - Mac user

February 27, 2026February 27, 2026

macOS 26 Tahoe is then end for Time Capsule / AirPort Extreme Disks for Time Machine

Starting with macOS 26 Tahoe, the OS now warns users that AirPort Disk and Apple Time Capsule-style network disks will no longer be supported for Time Machine backups in the next major release. That message appears in the Time Machine section of System Settings in macOS 26.

macOS 26 Tahoe (released in September 2025, with the latest update being 26.3 in February 2026) does not completely drop support for Time Capsule or AirPort Extreme-connected disks for Time Machine backups. Existing backups to these devices (using the legacy Apple Filing Protocol, or AFP) generally continue to work in Tahoe, including incremental backups to pre-existing Time Machine stores on HFS+-formatted volumes.

February 26, 2026May 27, 2026

U6 lite or shall I get the new u7 lite?

A comparison of the Ubiquiti UniFi U6 Lite and the Ubiquiti UniFi U7 Lite

February 24, 2026May 27, 2026

How to format a Mac Drive in Terminal

Here is a few sample examples of how to format a drive in Terminal.

Click Applications > Utilities > Terminal.

Always run Diskutil list. This will show you the list of the drives on that computer which will help you identify which drive name is needed to for the DiskNoteID at the end of the terminal command.

Formatting a Disk to Mac OS Extended Journaled (JHFS+) from Terminal in Mac OS X

diskutil eraseDisk JHFS+ DiskName /dev/DiskNodeID

February 20, 2026February 20, 2026

How to setup Dkim, SPF and DMARC for your mail service

DKIM, SPF, and DMARC are email authentication protocols that help prevent email spoofing, phishing, and spam. They work together to verify that an email really comes from the domain it claims to come from.

February 19, 2026February 19, 2026

What is Dmarc for email and do I need it?

DMARC stands for Domain-based Message Authentication, Reporting & Conformance.
It’s an email security standard that helps stop spam, phishing, and email spoofing—basically, it keeps bad actors from pretending to send email from your domain.

Here’s the plain-English version:

February 18, 2026February 19, 2026

What is Dkim for email and do I need it?

DKIM stands for DomainKeys Identified Mail.

It’s an email authentication method that helps prove an email really came from the domain it claims to be from—and that it wasn’t altered along the way.

Here’s the plain-English version:

When an email is sent, the sending mail server adds a digital signature to the message.
That signature is created using a private key owned by the sender’s domain.
The receiving mail server looks up the sender’s public key in DNS and checks the signature.
If it matches ✅ the email is legit and unchanged.
If it doesn’t ❌ the message may be spam, spoofed, or tampered with.

February 17, 2026February 19, 2026

What is SPF for email and do I need it?

SPF (for mail) stands for Sender Policy Framework.

It’s an email authentication method that helps stop email spoofing—basically, it tells the world which mail servers are allowed to send email on behalf of your domain.

How it works (plain English)

A domain publishes an SPF record in DNS.
That record lists the servers/IPs allowed to send email for the domain.
When an email is received, the recipient’s mail server:
- Checks the SPF record
- Verifies whether the sending server is on the approved list
If it’s not allowed, the message can be marked as spam, rejected, or flagged.

February 16, 2026May 27, 2026

macOS Big Sur Update 11.7.11

To update macOS Big Sur to version 11.7.11 (build 20G1443), which is the latest and final version of Big Sur (released February 2, 2026), follow these steps. Note that this is a very minor point release Apple made years after officially ending support for Big Sur in 2023. It mainly extends certificates so features like iMessage, FaceTime, and device activation keep working past January 2027 — there are no new security fixes beyond that.

February 9, 2026February 9, 2026

MacOS Catalina 10.15.8 update

macOS Catalina (version 10.15), originally launched in October 2019, marked a significant shift for Apple’s desktop operating system. It introduced features like Sidecar, Apple Arcade integration, the dedicated Music, TV, and Podcasts apps (replacing iTunes), enhanced security with Activation Lock, and the complete removal of 32-bit app support. After its final regular point update in 2020 (10.15.7), most users assumed Catalina had reached the end of its road, with Apple focusing on newer versions like Big Sur, Monterey, Ventura, Sonoma, Sequoia, and the current macOS Tahoe (version 26).

However, on February 2, 2026, Apple quietly released macOS Catalina 10.15.8 — more precisely labeled as macOS Catalina Security Update 2026-001 10.15.8 (build 19H2036). This update surprised many long-time Catalina users, as it arrived over five years after the previous point release.

February 6, 2026May 27, 2026

How to activate your Quark Express offline version

Step-by-Step Guide to Activate QuarkXPress (Current Versions: 2024–2026+) Both online and offline versions.

Install QuarkXPress Download and install the software from the official site:

Go to https://www.quark.com
Use your purchase download link, or visit the support installers page if you have active maintenance/subscription: https://www.quark.com/support/installers/
For trials: Start at https://www.quark.com/quarkxpress-trial