Open System Preferences by clicking on the Apple icon and choosing that option.Latest Updates!!! – For the latest information be sure to check the UPDATES section below.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. The dmg file is consists of 4.9GB and I will show you how you can download the dmg file.Some applications are not signed by Apple and will not be able to be. If FV2 encryption is enabled, you will be locked out of your data!Before going to download MacOS High Sierra dmg file make sure where you want to install the MacOS High Sierra Operating system because if you are Mac user and you are curious to download and install MacOS High Sierra on Mac computer, Needless to say, you need to download MacOS High Sierra from App Store.
![]() ![]() Dmg File Not Opening Sierra How To Boot ToIf 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. I’ve confirmed that the new installer has fixed the not enough space check!!! Apple just released macOS Big Sur 11.2.1 (20D75) that fixes the out of space error. 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. 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. You can use Disk Utility on Big Sur to erase “Macintosh HD” System Volume ONLY. (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. 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. The video is one of the most detailed videos that I’ve ever produced. 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’ll will walk you through how to fix this issue step-by-step. 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. I hope you find it helpful. Professional powerpoint templates for macStuck 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? Once installed you can boot to that external drive and remove enough files from “Macintosh HD – Data” for the Big Sur Upgrade to finish.UPDATE 02/11/21 – I’ve updated the Affected Big Sur Installers section. The 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. First I ran a few tests on an 11.1 system. Are the Big Sur Updaters also affected? (example 11.1 > 11.2 delta update)I wanted to make sure the issue was only happening with the Big Sur Upgrade and not the point release updates. I’m checking with the downloadable Big Sur full installer application.3. Big Sur Recovery startup disk screen that shows blank = no startup disk available.This issue affects the following macOS Big Sur Installers. 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. Next, I attempted to kick off the update and luckily software update stopped me. ![]() 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. An error occurred preparing the software update. 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.
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