![]() If an essential kernel extension isn’t migrated to your new system, you could find it almost impossible to install yourself. Security policy has changed substantially in recent years, and unsigned kernel extensions can’t readily be installed afresh, although they can still be grandfathered across in upgrades. One example is when you depend on old hardware such as an external RAID drive which is only supported by an old kernel extension. Sometimes, the migration itself can cause unexpected problems. Whether you migrate user accounts and apps from a copy or backup, or laboriously reinstall everything you need on your new system, there’s a chance that something important will get left out and cause problems. If you see this as a good opportunity to clean those up, and are prepared to spend the time doing so, you may find a clean install worth the extra effort. ![]() Those include your bulging Library folder which is bound to contain the remains of all sorts of apps long since removed. Where there can be benefits are in those system files, including Safari, which are stored not on the SSV, but on your writeable Data volume, and in the others there. So as far as the System volume is concerned, there’s nothing to be gained in a clean over a regular install. Every time that system is booted, its integrity is verified against Apple’s master Seal. That is first installed on the separate System volume, every file checked for integrity, the whole volume ‘sealed’ with a cryptographic hash, and then saved as an immutable snapshot. ![]() This article asks what benefits there are to doing this with Monterey or Big Sur, and how you can do it.īig Sur and Monterey are different from all previous versions of macOS in that the great bulk of macOS is loaded and run from a Sealed System Volume (SSV). In the days when system and user files were all intermingled in the same volume, there were good arguments that the result was worth the extra effort, both in cleaning out the crud accumulated over the years, and in ensuring that we started with a perfect, mint copy of macOS. "Keep in mind, in the five years prior to the pandemic, the Mac was essentially a flat business, growing on average 1% annually," Loup Ventures analyst Gene Munster wrote in May.In the past, many of us took the opportunity when upgrading to a major new version of macOS to perform a clean install onto a freshly-formatted disk. That was up a whopping 70% from the same period a year earlier. Apple said fans bought so many new M1 Macs that they helped push the company's desktop and laptop revenues to an all-time high of $9.1 billion during the first three months of 2021. The M1 chip is helping to change that though. It then brought over more mobile-centric apps like its iMessage communication service, FaceTime video chat and the App Store, which first launched in iOS.ĭespite Apple's popularity, and the success of its iPhones and iPads, the company's Mac computers still only represent less than 10% of the computers being used today. Over the years, Apple has focused on building apps and features for its MacOS that complement its other devices, including at first its iTunes software. ![]() Back when it was known as OS X, Apple co-founder Steve Jobs touted that it served as the basis for its iOS iPhone software. Watch this: Apple reveals MacOS Monterey with Universal ControlĪpple's MacOS, first released in 2001, powers the company's computers like the MacBook Pro, MacBook Air and iMac.
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