macOS Catalina 10.15.7 — Mac version

When a Mac gets left behind by the newest updates, it does not mean it's finished. Catalina was the bridge for Intel machines before Apple Silicon arrived, and it still does a proper job for plenty of people who just want a steady computer for everyday tasks.

• iTunes is gone, replaced by three focused apps: Music, Podcasts and TV. Each one loads faster and does one thing properly.
• Sidecar turns a nearby iPad into a second screen. Handy for spreading out a cluttered desktop without buying a monitor.
• The Find My app now covers your Mac as well as your phone. If a machine walks off, you have a way to track it down.
• iPad apps you already use — like drawing tools or cookery planners — can run right on the Mac if the developer allowed it.
• An iPhone or iPad plugs in through Finder now. Sync, backup and restore all happen from the sidebar without a separate app.

It is not the latest thing, and that is fine. On an Intel Mac with 4 GB of memory and a bit of free drive space, Catalina settles in as a reliable daily driver. Security fixes in 10.15.7 sorted out Wi-Fi dropouts and iCloud Drive sync hiccups, so the basics stay solid.

Leaving too little free space before you upgrade

Rushing into Catalina without checking a couple of things catches people out. The one I see most often at the repair café is not leaving enough free space before the upgrade. 12.5 GB is the minimum if you are coming from El Capitan or newer, but the installer unpacks temporary files on the way — so you really want 20 GB clear to avoid a stalled progress bar.

Another classic: downloading a macOS Catalina iso torrent and trying to boot from it on a Mac that does not make the compatibility cut. If the machine was sold before mid-2012, Catalina will not install, no matter how you feed it the installer. Check your exact model year in "About This Mac" before you spend an afternoon wrestling with it.

People also skip backing up their photo library before the switch from iTunes to the new media apps. Catalina converts the library format, and while it almost always works, I have seen a few scrambled album covers. A quick copy of the iTunes folder onto an external drive costs you nothing and saves a headache.

Workflow: archiving an old iPhone through Finder

With iTunes gone, backing up an iPhone feels different — but it is actually simpler once you know where to look. Here is how I walk someone through it at the bike library when they want to archive a phone before passing it on.

1. Plug the iPhone into the Mac with a cable that handles data. The charging-only cables that come with some power banks will not work here.
2. Open a plain Finder window — not Music, not TV, just Finder. Look at the sidebar under "Locations" and click your iPhone's name. If it does not appear, unlock the phone and tap "Trust This Computer".
3. The main pane shows a summary of the device. Under the "Backups" heading, tick "Back up all of the data on this iPhone to this Mac". Avoid ticking "Encrypt local backup" unless you also want saved passwords and Health data preserved — and you are certain you will remember the password you set.
4. Click "Back Up Now". A progress bar runs along the bottom of the window. Do not unplug until it finishes and the button reverts to its normal state.
5. To archive the backup so it does not get overwritten by a future automatic backup, go to the Finder menu bar, choose "Manage Backups…", right-click the fresh backup in the list and select "Archive". That locks it in place with a date stamp.

Restoring is the reverse: connect the phone, open Finder, click "Restore Backup", pick the archived copy. The whole workflow lives in one window now — no extra app to hunt for.

Your old printer may not have a 64-bit driver

At the café, someone usually hovers by the bench with a USB stick and a worried look. The same three questions come up every time.

"Will my old printer still work?" Probably, but it depends on whether the manufacturer wrote a 64-bit driver. Catalina dropped support for 32-bit apps and kexts, so ancient inkjets from the Snow Leopard era often fail. Most printers made after 2012 have a 64-bit driver baked into macOS already — plug it in and check System Preferences > Printers to test before you commit to the upgrade.

"Does a Catalina torrent install differently from the official one?" No. The installer app — however you got it — runs the same way. Open the disk image, copy the "Install macOS Catalina" app to your Applications folder and launch it. The tool inside does all the work. What matters is the integrity of the installer, not where it came from. If the disk image opens without errors and the app launches, it will behave identically.

"My Mac runs fine on High Sierra — should I bother?" It depends on one thing: do you need Sidecar or the newer Notes features? If you have an iPad that could act as a second display, Catalina is worth the afternoon. If not, and your machine is a 2012 MacBook Air with 4 GB of memory, staying put is perfectly sensible. The security fixes in 10.15.7 are solid, but so was High Sierra's last update. I tell people to let their own workflow decide rather than upgrading out of a vague sense of obligation.

• Security updates and bug fixes baked into 10.15.7.
• Wi-Fi now connects automatically after waking — no more manual re-joining.
• iCloud Drive files sync reliably again, no stuck transfers.
• Graphics glitches on the 2020 iMac 5K with the Radeon Pro 5700 XT are cleared up.

• An Intel 64-bit Mac
• 4 GB memory
• 12.5 GB available storage (if upgrading from El Capitan 10.11.5 or later)
• Broadband internet for some features