![]() ![]() At least one Tested Clone and / or Time Machine Backup should be Off - Site This is insurance incase the upgrades goes sideways. For addition purposes - two Tested Bootable Clones each to separate external drives. A Time Machine Backup is very useful and can be used to Revert to Previous Working macOS. This comprises having 3 Backups using 2 methods and 1 Off Site incase of Theft, Loss or Natural Disasters. Point # 7 - Do I have a Rescue Plan In-Place. These include Applications, Extensions and Drivers for any devices. Point # 6 - If upgrading from Mojave and earlier versions of macOS - Remember that Big Sur does not support anything 32 bit. 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. Point # 4 - Does the intended computer qualify for the upgrade. 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 below points should all be consider Before attempting the upgrade. 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. If an upGrade form High Sierra to Big Sur It too will download the full Installer and commence the installation. It will be the 11.5 version and once downloaded run the installer from the Applications folder.Ģ - Resart the computer in Recovery Mode ( INTEL Command + r ) and choose Reinstall macOS. 1update.ġ - Connect to Router via Ethernet connection and restart the computer in Safe Mode and then open the Apple Apps Store and get the Full Installer of Big Sur. There are several ways to download the Big Sur 11.5. If updating Big Sur 11.xx to Big Sur 11.5.1 The two are very different and require different methods to achieve the desired results. Is this really and upGRADE from and older version of macOS Like High Sierra which is were your posting in placed. Update implies Big Sur is already installed with perhaps an older version like Big Sur 11.5 and want to update to 11.5.1. How do I update macOS Big Sur 11.5.1? it won't let me do it ![]()
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