macOS Catalina 10.15.7 (macOS)

macOS Catalina is the version of Apple's operating system that shipped for Intel-based Mac computers, and for the experienced user the interest lies in what it can do beyond the glossy surface.

Voice Control and Sidecar change how you work

Voice Control lets you navigate and operate the Mac entirely by speech — useful for accessibility or for anyone who wants to keep hands on the keyboard while issuing commands. Sidecar extends the Mac desktop to an iPad, turning the tablet into a secondary display or input surface that mirrors the real workspace. These two features alone shift how a multi-machine workflow feels.

Notes search and Finder sync for the organised

Notes now searches inside scanned documents and can recognise objects in photos, which saves digging through folders when you need a receipt or a whiteboard shot. Finder handles sync and backup for connected iPhones and iPads directly, without launching iTunes or the Finder sidebar. For the technician who keeps a dozen devices in rotation, that one change cuts a step out of every file transfer.

2013 MacBook Pro runs Catalina fine with 4 GB RAM

Will Catalina run on my 2013 MacBook Pro?
Compatible models start from Mid 2012 for the MacBook Pro and Late 2012 for the Mac mini and iMac, so a 2013 machine should be fine provided it has 4 GB of memory and Intel 64-bit architecture. The installer requires 12.5 GB of free space if you are upgrading from OS X El Capitan 10.11.5 or later.

Can I still use 32-bit apps?
macOS Catalina dropped support for 32-bit applications. If you rely on older software that has not been updated to 64-bit, check compatibility before you upgrade. The system itself is 64-bit only.

Do I need an internet connection to install?
The installer itself works offline. A broadband connection is only required for certain features — iCloud syncing, Find My device location, or downloading media from Apple Music.

Will my existing iTunes library transfer?
Catalina replaces the old iTunes media functions with separate Apple Music, Apple TV and Apple Podcasts apps.

Media suite handles 4K video and recorded podcasts

One technician I swap notes with manages a media suite of twenty iMacs running a mix of OS X and earlier macOS versions. Students edit video, record podcasts and browse reference material. Catalina's new media apps let the suite handle music, video and podcasts natively without iTunes getting in the way. The Find My app also gives the technician a way to locate a missing iMac if one gets moved between rooms — assuming the machine is signed into the same Apple ID. For day-to-day use, the redesigned Safari start page means students see their own browsing history and bookmarks rather than a blank tab, which cuts down on the "where did my tabs go" questions.

Adds Voice Control, Sidecar, and iPad-as-display over Mojave

Against macOS Mojave (10.14), Catalina adds Voice Control, Sidecar and the split media apps. Mojave kept iTunes as a single application and lacked the iPad-as-display feature. For users who work across a Mac and an iPad, Catalina is the more capable system. Against macOS Big Sur (11), Catalina is leaner — Big Sur requires a newer generation of hardware and uses more disk space for its system files. On older Intel Macs, Catalina feels more responsive because it does not demand the same baseline resources. The language selection is effectively identical across all three versions, so multilingual schools or offices lose nothing by sticking with Catalina.

• Important security updates and bug fixes
• Fixes an issue where macOS would not automatically connect to Wi-Fi networks
• Resolves a problem that could prevent files syncing through iCloud Drive
• Addresses a graphic issue on iMac (Retina 5K, 27-inch, 2020) with Radeon Pro 5700 XT

• macOS 10.9 or later
• Intel architecture
• 4 GB memory
• 12.5 GB available storage for upgrade from OS X El Capitan 10.11.5 or later