How to Update Your Mac to the Latest Version of macOS

Updating your Mac is the most critical maintenance task for ensuring your computer remains secure, stable, and compatible with the latest software applications. While Apple has made the process increasingly intuitive, a major system update involves complex changes to the underlying file system and security protocols.

To update a Mac running macOS Ventura, Sonoma, Sequoia, or newer, click the Apple menu () > System Settings > General > Software Update. If your Mac is running macOS Monterey or older, go to Apple menu () > System Preferences > Software Update. Clicking "Update Now" or "Upgrade Now" will initiate the download and installation process.

Understanding the Difference Between macOS Updates and Upgrades

Before diving into the technical steps, it is essential to distinguish between a software "update" and a software "upgrade." This distinction affects how much time you should set aside and how much storage space you will need.

Software Updates

A software update is typically a "point release" (e.g., moving from macOS 14.1 to 14.2). These are smaller files, usually ranging from 500MB to 4GB. They focus on:

Critical security patches.
Minor bug fixes.
Stability improvements for built-in apps like Safari or Mail.
Rapid Security Responses, which are tiny, urgent fixes that Apple applies without requiring a full system restart.

Software Upgrades

A software upgrade is a major version jump with a new marketing name, such as moving from macOS Sonoma (14) to macOS Sequoia (15) or the newer macOS Tahoe (16). These are significant overhauls that:

Introduce new core features and user interface changes.
Require between 12GB and 15GB for the installer and often an additional 25GB to 40GB of free space to execute the installation.
Can take anywhere from 30 minutes to over an hour to complete depending on your hardware and internet speed.

Essential Preparation Before Updating Your Mac

In our experience managing professional creative environments, most "bricked" Macs or failed installations occur because users skip the preparation phase. Never assume an update will go perfectly; instead, prepare as if it might fail.

Create a Comprehensive Backup

Never initiate a major upgrade without a current backup. Apple’s built-in Time Machine is the industry standard for this.

Connect an external hard drive or SSD.
Go to System Settings > General > Time Machine.
Select your drive and click "Use Disk."
Wait for the "Backup Complete" notification.

If you use cloud services like iCloud Drive, Dropbox, or Google Drive, ensure all your files are fully synced to the cloud before starting. However, remember that cloud sync is not a true system backup; it only saves files, not your system configurations or applications.

Audit Your Storage Space

A common error during installation is "Insufficient space to install." While the installer might be 13GB, macOS needs "breathing room" to move files around during the process.

Minimum recommended free space: 35GB for a major upgrade.
How to check: Go to System Settings > General > Storage.
Quick Tip: If you are low on space, look at the "System Data" or "Other" category. Clearing your browser cache and emptying the Trash can often reclaim several gigabytes instantly.

Power and Connectivity

Power Source: If you are using a MacBook Pro or MacBook Air, always plug into a power adapter. A shutdown mid-update due to a dead battery can corrupt the firmware, necessitating a visit to an authorized service provider.
Network Stability: Use a stable Wi-Fi network or, preferably, a wired Ethernet connection. Public Wi-Fi in coffee shops or hotels is notoriously unstable for 12GB+ downloads and can result in corrupted installer files.

How to Update macOS on Modern Systems

For Macs running macOS Ventura (13.0) and all subsequent versions including Sonoma, Sequoia, and Tahoe, Apple has aligned the interface with iOS, moving settings into the "System Settings" app.

Manual Update Steps

Open the Apple menu () in the top-left corner of the screen.
Select System Settings.
In the sidebar, click on General.
On the right-hand side, click Software Update.
The system will automatically "Check for Updates." This requires an active internet connection.
If a version is available:
- Update Now: For minor point releases and security fixes.
- Upgrade Now: For major version changes (e.g., Sequoia to Tahoe).
Review the Terms and Conditions and click "Agree."
Enter your Mac's administrator password when prompted.

Your Mac will download the file. Once downloaded, it will prompt you to restart. During the restart, you will see the Apple logo and a progress bar. Do not close the lid or press the power button during this phase.

Updating Older macOS Versions

If your hardware is older or you have intentionally stayed on an older operating system like Monterey, Big Sur, or Catalina, the path is slightly different.

Click the Apple menu ().
Select System Preferences (note the name difference).
Look for the Software Update icon (a gear with a red notification badge).
Click Update Now or Upgrade Now.

If you are running a version as old as macOS High Sierra or Mojave, you may find that the "Software Update" icon is missing from System Preferences. In these legacy cases, you must open the App Store, click the Updates tab, or search for the specific macOS version name (e.g., "macOS Monterey") to download the installer manually.

Configuring Automatic Updates for Efficiency

For most users, enabling automatic updates is the best way to stay protected without constant manual checking. However, there are nuances to how Apple handles "Auto" settings.

Navigate to System Settings > General > Software Update.
Click the "i" (Info) icon next to Automatic Updates.
You will see several toggles. We recommend the following configuration:
- Check for updates: ON. (Minimal system impact).
- Download new updates when available: ON. (This happens in the background).
- Install macOS updates: OFF (for professionals) or ON (for casual users). Keeping this OFF allows you to choose exactly when your computer will be out of commission for 30 minutes.
- Install application updates from the App Store: ON.
- Install Security Responses and system files: ON. This is critical. It allows Apple to fix "Zero Day" vulnerabilities without a full OS update.

Updating Your Applications Post-OS Update

An operating system update only covers Apple’s core software. After your Mac restarts with its new OS, your third-party apps may need attention to maintain compatibility.

App Store Apps

Open the App Store.
Click Updates in the sidebar.
Click Update All.

Non-App Store Apps

Apps downloaded directly from developer websites (like Adobe Creative Cloud, Chrome, or Zoom) usually have their own update mechanisms.

Chrome: Click the three dots in the top right > Help > About Google Chrome.
Microsoft Office: Open Word > Help > Check for Updates.
General Tip: Many modern apps will prompt you with a "A new version is available" pop-up upon launch after a system update. Always accept these to ensure the app doesn't crash on the new OS architecture.

Troubleshooting Common Update Failures

Sometimes, the update process doesn't go as planned. Here are the most common issues we see in technical support scenarios and how to resolve them.

"The update could not be verified" or "An error occurred while downloading"

This usually indicates a network interruption or a corrupted download file.

Solution: Go to your Applications folder. Look for a file named "Install macOS [Version Name]." Drag it to the Trash, empty the Trash, and restart your Mac. Then, try the download again in System Settings.

The Progress Bar is Stuck

It is normal for the progress bar to stay at "1 minute remaining" for 10 or 20 minutes. The system is performing deep file system cleanup.

Solution: Wait at least two hours before assuming it is frozen. If the Mac is truly unresponsive (the Caps Lock light doesn't toggle), you may need to perform a hard restart, but this is a last resort.

"Not Enough Free Space"

If you have deleted files but the Mac still says there isn't enough space, it is often due to Time Machine local snapshots.

Solution: If you have Time Machine enabled, the Mac saves "snapshots" of your data on your internal drive. Performing a manual backup to your external drive will usually "flush" these snapshots and free up the required space.

Update Not Appearing for Your Mac

If your Mac says it is "Up to date" but you know a newer version exists, your hardware may have reached its end-of-life for official Apple support.

Check Compatibility: For example, macOS Sequoia generally requires a Mac from 2018 or later (depending on the model). If you have a 2015 MacBook, you cannot officially update past Monterey.

Advanced Update Methods: Using the Terminal

For IT administrators or power users who find the graphical interface unresponsive, the macOS Terminal provides a powerful alternative for updating.

Open Terminal (via Spotlight or Applications > Utilities).
Type the following command to see available updates: softwareupdate -l
To download and install all available updates, type: sudo softwareupdate -iaR
- -i = install
- -a = all
- -R = restart automatically when finished
Enter your admin password (no characters will appear as you type).

Summary

Keeping your Mac updated is a two-fold process: preparing the hardware and executing the software installation. By ensuring you have a current Time Machine backup and at least 35GB of free space, you mitigate almost all common risks associated with system upgrades. Whether you prefer the manual control of System Settings or the convenience of automatic updates, staying current with the latest macOS version is the best way to protect your digital life and enjoy the latest innovations from Apple.

FAQ

What is the latest version of macOS? As of late 2024 and moving into 2025, the current major versions include macOS Sequoia (version 15) and the newly released macOS Tahoe (version 16). Always check System Settings to see the specific version compatible with your hardware.

Will updating my Mac delete my files? A standard update or upgrade is designed to keep all your files, apps, and settings intact. It only replaces the operating system files. However, hardware or software glitches during the process can lead to data loss, which is why a backup is mandatory.

How long does a Mac update take? Minor updates usually take 10-20 minutes. Major upgrades (like moving from Sonoma to Sequoia) typically take 30-60 minutes to download and another 20-40 minutes to install.

Why is my Mac so slow after an update? After a major update, macOS performs "indexing" in the background. Spotlight re-scans your files, and the Photos app may re-scan your library for faces. This can cause high CPU usage and fan noise for 24-48 hours.

Can I update an "unsupported" older Mac? Officially, no. Apple limits updates based on hardware capabilities (especially the transition from Intel to Apple Silicon). While community tools like OpenCore Legacy Patcher exist to bring new OS versions to old hardware, these are not supported by Apple and can lead to stability issues.

What should I do if my Mac won't turn on after an update? Try booting into macOS Recovery. For Apple Silicon Macs (M1/M2/M3/M4), press and hold the power button until "Loading startup options" appears. For Intel Macs, hold Command + R during startup. From there, you can use Disk Utility to repair your drive or reinstall the OS.