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I do not have enough space on my system using 91Gig

How can a reduce space on my system using 91 Gig of the 121 Gig total on my Macintosh HD. I need 31 Gig free space to download BigSur


Posted on Jul 21, 2021 5:55 AM

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Posted on Jul 21, 2021 7:02 AM

How to free up storage space on your Mac - Apple Support

How to upgrade to macOS Big Sur - Apple Support

"If upgrading from macOS Sierra or later, your Mac

needs 35.5GB of available storage to upgrade. If upgrading from an

earlier release, your Mac needs up to 44.5GB of available storage. To

upgrade from OS X Mountain Lion, first upgrade to OS X El Capitan, then

upgrade to macOS Big Sur."

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Question marked as Best reply

Jul 21, 2021 7:02 AM in response to laurettafrommooinooi

How to free up storage space on your Mac - Apple Support

How to upgrade to macOS Big Sur - Apple Support

"If upgrading from macOS Sierra or later, your Mac

needs 35.5GB of available storage to upgrade. If upgrading from an

earlier release, your Mac needs up to 44.5GB of available storage. To

upgrade from OS X Mountain Lion, first upgrade to OS X El Capitan, then

upgrade to macOS Big Sur."

Jul 21, 2021 7:03 AM in response to laurettafrommooinooi

What is “Other” storage on a Mac, and how can I clean it out?


How to free up storage space on your Mac


OmniDiskSweeper for deeper checking for files under your direct Control


Go64 to check for 32 bit applications as Big Sur does not support Anything 32 Bit and no workaround.


Read Before attempting the Upgrade to Big Sur


Tips How to Upgrade to Big Sur 


There are several points to consider before attempting the upgrade to Big Sur. The most important is Due Diligence on the part of the User and is a Prerequisite for a smooth upgrade.  


The below points should all be consider Before attempting the upgrade.


Point # 1 - Are there pre-existing Unresolved Software Issues. They should be resolved prior to upgrading - they may carryover to Big Sur making the system unstable / unusable.


Point # 2 - Are there any AntiVirus, Disk Cleaner, Optimizers, Un-installers, etc installed which should be removed as per Developers Instructions. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation. The Built-in Security of Big Sur is all that is required.


Point # 2 A - Commercial VPNs should only be used if Mandated by Corporate Head Office for working remotely. Otherwise - ones Privacy and Security touted by the VPN is suspect.


Point # 3 - What are the System Requirements ie: Empty Space Requirements specific to the Big Sur.


Point # 4 - Does the intended computer qualify for the upgrade.


Point # 5 - Are the installed Applications / Extensions compatible with Big Sur. Check with the Developer for compatible Apps / Extension or do they offer updates. Same goes for Third Party Drivers for Printer, Scanners etc.


Point # 6 - If upgrading from Mojave and earlier versions of macOS - Remember that Big Sur does not support anything 32 bit. These include Applications, Extensions and Drivers for any devices. There is no workaround.


Point # 7 - Do I have a Rescue Plan In-Place. This comprises having 3 Backups using 2 methods and 1 Off Site incase of Theft, Loss or Natural Disasters. A Time Machine Backup  is very useful and can be used to Revert to Previous Working macOS. For addition purposes - two Clones each to separate external drives. This is insurance incase things goes sideways. At least one Clone and / or Time Machine Backup should be Off - Site


Point # 8  - To upgrade to Big Sur will requires a quick, stable and reliable Internet Connection - preferred method is via Ethernet Connection. 


If not available and using Wifi - move computer as close to the Access Point / Router and disconnect all other devices connected to Wifi. Want the maximum bandwidth for the computer being upgraded to Big Sur.



I do not have enough space on my system using 91Gig

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