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Before downloading any firmware updates, verify the firmware is appropriate for the specific model number of your product and that its being updated in correct order.

To avoid incorrect usage, we recommend you to please contact your LTS specialist for guidance.

The update downloads to the external drive as well just select the target drive during the initial installation process.

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MacOS 11 is understandably one of the biggest updates yet, boasting a visual overhaul, new notifications, a faster Safari experience, and an upgraded Messages app.

However, its currently in public beta, meaning you shouldnt install it if youre not willing to take risks.

Given its possible instability, this release is better suited for a Mac you dont primarily use, such as a spare MacBook.

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As with all MacOS updates, some Macs cant support the new software due to outdated hardware.

You certainly dont want to go through the process of acquiring the public beta if you cant even run it on your Mac.

Theres a chance of serious bugs corrupting your data, and you need to be prepared in case that happens.

Instead, you should have a Time Machine backup locked and loaded before installing any beta.

Select Encrypt Backups on the prompt, click the Use Disk button, and youre good to go.

If not, you can manually enable an external disk to use Time Machine by using the following steps.

You can partition your Macs drive and silo off a space to experiment with Big Sur.

This is a little more complicated, and you need enough local storage to manage two operating systems.

If you are interested, we have a guide where you can learn more.

Either sign up using a valid Apple ID or sign in if youre currently enrolled.

Unlike the Developers program, access to this public-facing program and its beta software is completely free.

Youll need to choose Allow when prompted to download the file from Apple.

Double-click on that file, and follow the prompts to agree with Apples terms and install the required Big Sur profile and installer.

If not, you can locate it within the Applications folder in Finder.

Again, youll proceed through several prompts: Back up your Mac, agree to Apples terms, and select the target drive.

This is likely due to Time Machine, which stores local snapshots that the user cant see the installer counts against the total storage space.

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