Apple States Requiring 35.6 GB of Empty Space but suggest 50 GB Point # 3 - What are the System Requirements ie: Empty Space Requirements specific to the Big Sur. Otherwise - ones Privacy and Security touted by the VPN is suspect. Point # 2 A - Commercial VPNs should only be used if Mandated by Corporate Head Office for working remotely. The Built-in Security of Big Sur is all that is required. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation. Point # 2 - Are there any AntiVirus, Disk Cleaner, Optimizers, Un-installers, etc installed which should be removed as per Developers Instructions. They should be resolved prior to upgrading - they may carryover to Big Sur making the system unstable / unusable. Point # 1 - Are there pre-existing Unresolved Software Issues. The most important is Due Diligence on the part of the User and is a Prerequisite for a smooth upgrade. There are several points to consider before attempting the upgrade to Big Sur. Use this free app to discover which apps you haveĪre 32bit, then contact the developers of the software to see Some updates may be free, some may be paid. Your Mac is probably running 32bit apps and these will need to be updated to 64bit apps, If you are considering upgrading to Catalina or Big Sur be warned they do not support 32bit apps. How to upgrade to macOS Big Sur - Apple Support If you want to or are able to install Big Sur, open Safari and click on the link below. Restart, click on the link again, the App Store should say ‘Get' or 'Download'. Go to the Applications folder locate Install macOS Catalina.app. If the App Store says ‘Open’ then it is detecting a previous download of the install app Go to the Download OS section and click on macOS Catalina.īefore upgrading make a full back up of your Mac.Ĭheck that third party apps you use have updates available for the new OS.Ĭheck that your printers/ scanners etc have updated drivers and software available for the new OS.Ĭonnect your mac to your router via cable rather than rely on WiFi.ĭo not use your mac while it is downloadingĪnd do not use any other devices that share the same internet connection. How to get old versions of macOS – Apple Support Want the maximum bandwidth for the computer being upgraded to Big Sur.A 2015 iMac can upgrade to macOS Catalina 10.15.7 or macOS Big Sur 11.6. If not available and using Wifi - move computer as close to the Access Point / Router and disconnect all other devices connected to Wifi. Point # 8 - to upgrade to Big Sur will require a quick, stable and reliable Internet Connection - preferred method is via Ethernet Connection. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS. Point # 7 - Are there any AntiVirus, Disk Cleaner, Optimizers, Defrag, VPNs etc installed which should be removed as per Developers Instructions. This is insurance incase the upgrades goes sideways This comprises having a Time Machine Backup and for addition purposes - two Tested Bootable Clones each to separate external drives. Point # 6 - Do I have a Rescue Plan In-Place. Same goes for Third Party Drivers for Printer, Scanners etc. Check with the Developer for compatible Apps / extension or do they offer updates. Point # 5 - Are the installed Applications / Extensions compatible with Big Sur. Like Catalina - Big Sur requires the drive be formatted as APFS and does not automatically convert HFS Journaled to APFS. Point # 4 - Is the existing System File System meet the file system requirements of Big Sur. Point # 3 - Does the intended computer qualify for to upgrade. Point # 2 - What are the System Requirements ie: Empty Space Requirements specific to the Big Sur. They should be resolved prior to upgrading - many will / may carryover to Big Sur making the system unstable / unusable. The below points should all be consider Before attempting the upgrade. If as you say thinking about the move from Big Sierra to Big Sur as few points to consider. Have had not issues aside from learning newer functionality.
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