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Create bootable Big Sur installer

At some point you may wish to perform a full clean install of your macOS, which maybe Big Sur or an older system version like Catalina.
For most people a handy utility like DiskMaker X is an useful option, however not working anymore and never will be for Big Sur.

Apple increased security levels in Big Sur which makes it harder or impossible for third party software to enter parts of the system. Below a manual creation is described in order to create a bootable Big Sur installer:

Download macOS
  • Download: macOS Big SurmacOS CatalinamacOS Mojave, or macOS High Sierra 
    These download to your Applications folder as an app named Install macOS [version name]. If the installer opens after downloading, quit it without continuing installation. To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
  • Download: OS X El Capitan
    This downloads as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.



Apple’s new iMac 2021

The iMac, being my favourite computer, now after years Apple introduced an all-new iMac 2021 featuring a much more compact and remarkably thin design, made possible by using the new M1 chip. The new iMac design is just 11.5 mm thin, also losing the bulge in the middle which was needed to house cooling for the old Intel processor. While now featuring an even thickness, it is not having the true minimalistic edges on 2020 and earlier models. The stand is less pronounced in appearance and does not integrate in the housing as earlier 2020 model. The new iMac will be available in vibrant colors to match a user’s personal style. The new 2021 iMac, features a 24-inch 4.5K Retina display with 11.3 million pixels, 500 nits of brightness, and over a billion colors, delivering a great viewing experience.

2020 iMac model 2021 iMac model
27-inch (diagonal) 5K Retina display 24-inch (diagonal) 4.5K Retina display
5120‑by‑2880 pixels 4480 by 2520 pixels
500 nits brightness 500 nits brightness
Wide color (P3) Wide color (P3)


The differences between the two models;


iMac 2020 iMac 2021
(Up to) 10-core Intel Core i9 processor 8-core Apple M1 chip
(Up to) 128GB (Up to) 16GB
(Up to) 8TB (Up to) 2TB
1080p FaceTime HD camera 1080p FaceTime HD camera with M1 image signal processor
Stereo speakers High-fidelity six-speaker system with force-canceling woofers and spatial audio
Two Thunderbolt 3 (USB-C) ports, Four USB-A ports, Gigabit Ethernet, SDXC card slot Two Thunderbolt / USB 4 ports and Gigabit Ethernet
Magic Keyboard Magic Keyboard with Touch ID

So display quality wise, I think the 2020 model has maybe the upper hand on the 2021 model. But that said, the new iMac’s screen looks better as its bezels are much smaller compared to the 2020 model. This creates a larger display view even having smaller 24 inch size.
To me the visual bezel upgrade is the most important upgrade when it comes down to overall appearance.

(images: https://reviewmacapps.com/images-new-imac-2021/)


The best Antivirus for Mac test Institute


AV-TEST GmbH is an independent supplier of services in the fields of IT Security and Antivirus Research, focusing on the detection and analysis of the latest malicious software and its use in comprehensive comparative testing of security products.

Due to the timeliness of the testing data, malware can instantly be analyzed and categorized, trends within virus development can be detected early, and IT-security solutions can be tested and certified. The AV-TEST Institute’s results provide an exclusive basis of information helping vendors to optimize their products, special interest magazines to publish research data, and end users to make good product choices.

AV-TEST has operated out of Magdeburg (Germany) since 2004 and employs more than 30 team members, professionals with extensive practical experience. The AV-TEST laboratories include 300 client and server systems, where more than 2,500 terabyte of independently-collected test data, containing both malicious and harmless sample information, are stored and processed.


So, whenever you’re looking for a new antivirus protection to protect your data, your data and in cases against ransomware, checkout the
website and see which security application fits your needs best. Every yearly quarter a new in-depth test is performed to shuffle to good from the bad. System impact is a feature making real practical difference using your Mac, where detection scores differences are less. Best to get
the application with best scores on both giving you best value and security.



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