For Intel devices running High Sierra (10.13) or newer, follow.The macOS Big Sur upgrade is not checking to make sure enough free HD space is available. Mac: El Capitan (10.11) and up. Windows Server 2012 and up. Your music, TV shows, movies, podcasts and audiobooks will transfer automatically to the Apple Music, Apple TV, Apple Podcasts and Apple Books apps, where you’ll still have access to your favourite iTunes features, including purchases, rentals and imports.Windows: Windows 7 and up. Download macOS Catalina for an allnew entertainment experience.If the installer finds that you do not have enough free space for the upgrade, it will stop and not let you continue. The installation completed, and I started opening my apps to see what had broken in the install process.Quick Summary – When you start the macOS Big Sur upgrade, the installer should first check to make sure your Mac has enough free space available. During the installation process, I selected 'Use iCloud Drive' since i had been using it with El Capitan on my MacBook Pro. If FV2 encryption is enabled, you will be locked out of your data!Today Ive been through hell and back today with Sims 4 - its been greyed out in Origin for the whole day, and the only way Ive managed to rectify that is by uninstalling and reinstalling both Origin and the Sims 4 (meaning I have to start all my games again ) Anyway, once Id done that, Origin said that Sims 4 requires an update to play (deepsigh) and when I press update, it goes Latest Updates!!! – For the latest information be sure to check the UPDATES section below.I upgraded to macOS Sierra 2 days ago.Your hard drive is now 100% full and the installer is now stuck in a boot loop attempting to finish the install. The upgrade will start even if you only have 1% of free space left and will fail. This free space check is NOT working.
I Have Been Ing Sierra For 2 Days Whats Wrong Why Won'T It Finish Full Report AndThe 2019-001 Security update issue was close to this one. Macintosh Full report and Deep Dive into the issue + Multiple fixes and workarounds to save your data and let the Big Sur Update finish! Past macOS update issues like this oneThis isn’t the first time I’ve reported on update issues that could cause data loss. >The reason behind the traffic increase was because the M1 personalization error message was very close to the new error.Big Sur Upgrade out of space error = An error occurred preparing the software update.Big Sur Upgrade out of space error = An error occurred applying the software update.Apple Silicon M1 personalization error = An error occurred preparing the update.This led me to investigate this issue further.Mr. I noticed an increase in traffic to this article. Reports started to roll in saying that the Big Sur Upgrade failed and the only way to fix it was to erase and reinstall macOS. The first signs that this is becoming a larger issue came after the macOS Big Sur 11.2 update was made available.Can I get my Mac out of this install loop? What happens when the upgrade installer runs out of space? How can I prevent this from happening to me? How can I tell if my Mac is affected by this issue? Are the Big Sur Updaters also affected? (example 11.1 > 11.2 delta update) Big Sur 11.2 Upgrade not enough free space problem. Finally I walk you through a new way to fix your Mac if you do NOT have a 2nd Mac using Internet Recovery!UPDATE – 02/15/21 – Apple has just released a new build of macOS Big Sur 11.2.1 (20D75). I also go over how to boot to an external USB drive that has macOS on it to fix the issue. If you are seeing this issue, please contact Apple.UPDATE – 03/17/21 – Users are still having this issue, I’ve updated the error message section to add –UPDATE – 02/19/21 – I’ve heard from you! I just finished an update video that goes over how to connect your Big Sur problem Mac to a Catalina & Big Sur Host Mac via Target Disk Mode! You no longer need a High Sierra or Mojave Mac. How to fix this issue – Erase & Reinstall macOS 13 How to fix this issue + retain your data! (Previously this would only work on a Mojave or High Sierra Mac). Your Data volume should mount!UPDATE #2 – 02/14/21 – A new way to mount an Encrypted Mac to a Big Sur or Catalina Device. Open disk utility and right click on “Macintosh HD – Data” and click “Show In Finder”. If you see “Macintosh HD” Mounted on your desktop, you can do the following. (I can’t remember if this was my T2 Unencrypted test or not). 2/14/21UPDATE #3 – 02/14/21 – In some tests and including the demonstration in my video, I was able to get Macintosh HD to mount (in Big Sur) on the desktop after entering in the password for TDM. The article instructions will be updated soon.UPDATE #1 – 02/14/21 – Just finished my video on this issue, it ended up being over one hour long. I go over this process at the very end of the video. The upgrade is still staged and can finish if you don’t want to do a full erase. Doing this will then allow you to mount “Macintosh HD – Data” and your password will now work! You can either backup your data, or clear some space. This is a very complicated issue and I did my best to try and explain it. I had to go over multiple situations that a user might be in. I went over the entire issue, plus went over how to fix the issue in a step-by-step set of instructions. I also just finished filming my deep dive video on this issue. You will be able to use a catalina or Big Sur Mac. I am putting together that information now. PREVIOUS UPDATESUPDATE 02/13/21 – I now have a new way to rescue your Mac if it’s encrypted so you do not need a Mohave or High Sierra Mac. Evolve vpn for macThe new way involves installing macOS Mojave from recovery on an external USB drive. This new way will work if you do not have a 2nd Mac for Target Disk mode, or if your Mac is newer and you can’t install Mojave on it. I’m editing it now, stand by.UPDATE 02/12/21 – I’ve added a new section below on how to rescue your data when your Mac is FileVault encrypted. Pop up error – An error occurred preparing the software update – An error occurred applying the software update Stuck in recovery Boot Recovery Assistant. Big Sur Upgrade stuck in an install loop Big Sur 11.2 Upgrade not enough free space problem.What are the reported problems with this update? ![]() If you installed the macOS Big Sur Upgrade on a compatible Mac and did not have enough free space, you will have problems.2018-2020 Mac devices with a T2 security chip make things even more difficult if you enabled Filevault 2 encryption.The differences are between 2018+ T2 Macs and FileVault encryption. Affected Mac HardwareIn the past, macOS update problems could only happen on specific hardware. I increased the free space to 2.5GB and the update finished properly.Attempting to update from Big Sur 11.1 to 11.2 with only 500MB free space. Instead of getting stuck in an update loop the Mac just booted back into OS. I cleared up 1.5GB and the updater let me install the update but did NOT finish. The other error that you might get is “An error occurred applying the software update.”This is the error you will see after trying to upgrade to macos Big Sur. How can I tell if my Mac is affected by this issue?If you installed the macOS Big Sur Upgrade and you are now stuck in boot loop ending with the error – An error occurred preparing the software update – you are affected by this issue. I guess it could be possible, if you attempted to run the full installer over the top of your current install.More on recovery my efforts below. This problem further complicates recovery efforts.Even more frustrating, unless you disabled external boot security you will not be able to boot to a USB Big Sur installer or external hard drive.NOTE: Apple Silicon Macs are immune to this issue because the minimum OS M1 Macs can run is macOS Big Sur. So you need at least a minimum of 35.5 GB for the Big Sur Upgrade.It’s unknown if the size calculation includes the 13GB full installer or not.EDIT: Steve said that the 35GB number does NOT include the 13GB Big Sur Installer. If upgrading from an earlier release, macOS Big Sur requires up to 44.5GB of available storage. How can I prevent this from happening to me?Apple states that you need the following amount of free space available for a Big Sur upgrade.If upgrading from macOS Sierra or later, macOS Big Sur requires 35.5GB of available storage to upgrade.
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