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Apple: Upgrading to macOS Big Sur can cause irreparable damage!

It was already in November last year that macOS Big Sur was made available to all users and since then Apple has sought to correct problems by launching several updates. It has now been reported that Big Sur has a serious problem that can result in data loss if you upgrade a Mac to the latest version of the software.

The Mr Macintosh website states that this problem occurs if there is not enough disk space for the installation to be successful.

Upgrading to macOS Big Sur can cause data loss

macOS Big Sur

After finding several reports of people with data loss after the update spread across the internet, the medium found that the macOS Big Sur client is not properly checking the amount of available disk space.

At the same time that the user starts the update process, the computer “freezes” and stops responding to commands. This fact can lead to permanent data corruption.

Apple indicates that upgrading a Mac for the first time to Big Sur requires a minimum of 35.5 GB available on disk, not counting the 13 GB installer.

Backup allows you to erase the disk and reinstall macOS

If your Mac doesn’t have this space, macOS will try to install it anyway. According to reports, everything goes well until a message appears at the end of the installation: “An error occurred while preparing the software update.”

If this error occurs, the Mac computer will be unable to start. If you have a backup copy you can erase the disk and reinstall macOS, but if you don’t, it will be very difficult to recover your data.

The problem does not seem to affect OTA updates from macOS 11.1 to macOS 11.2. Apple has not yet commented on the situation but a solution is expected soon in view of the seriousness of the situation.

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