![]() If installing an older version of macOS, select the Medium Security button or if installing a supported, third-party OS (Linux, for example), select the No Security button under the Secure Boot section. If installing a modern version of macOS ( Catalina or Big Sur) and you have internet access, select the Full Security button.If prompted, authenticate before proceeding with modifying settings Click on the menu and select Utilities | Startup Security Utility.Boot to the recovery partition (or Internet Recovery) by pressing the Command + R keys.But it doesn’t have to be if you follow the steps outlined below to get your Mac back in action. While this is the intended and correct action to take, it can cause headaches when trying to load macOS (or any other supported OS for that matter) from a USB drive. The downside to this? By default, your Apple hardware doesn’t trust anything that isn’t bolted on, preventing the device from loading software from a USB drive or any third-party device to maintain the integrity of your system. SEE: Hackers claim they can now jailbreak Apple’s T2 security chip (ZDNet) This is an effort to thwart data exfiltration attempts and other attacks that would load a dubious operating system, potentially opening up the device to funneling malicious code or advanced persistent threats (APT). Depending on your infrastructure and the tools available to you at the time, some of the more common ways are through Internet Recovery or using a USB installer to make offline installations-for those times when the device cannot be connected to the Internet-a breeze.Īpple’s inclusion of the T2 security chip which, among other things, enforces Secure Boot to ensure that your Mac computer only boots from safe, securely signed environments. Over the years, the task of reinstalling the operating system on computers has branched out to offer multiple avenues to get the OS loaded properly. SEE: 10 MacOS tune-up tricks for your Mac (free PDF) (TechRepublic) The outcomes may vary slightly (or largely) depending on what needs to be done, but thankfully there is hope for success. ICloud Usage Policy (TechRepublic Premium)Īs with most things computer-related, there are multiple ways to accomplish a task or execute a process. How to boost your iPhone’s battery chargeĬlean your Mac before you break down and buy a new one With T2-enabled Macs, however, some of the ways to perform this task must be modified to get around the enhanced security restrictions. Reinstalling macOS cleanly has always been a simple process. Go to System Preferences > Users & Groups, and select your account in the “Current User” section on the sidebar.How to disable T2 security to load macOS from an external source. ![]() If the problem continues after exiting Safe Mode, boot into Safe Mode again and remove Login Items (or startup apps). Remove Login Itemsĭisabling Login Items can also resolve startup problems on Mac notebooks and desktops. So, if your Mac boots correctly in Safe Mode, login items are likely the root cause of the question mark folder issue. Login Items don’t load during the Safe Mode boot process. Restart your Mac normally and check if that resolves the problem. Enter your Mac’s password on the login screen to enter Safe Mode. ![]() Select your startup disk, press and hold the Shift key, and select Continue in Safe Mode on the next page. Wait 10 seconds, press and hold the Power button again until the startup options page comes on the screen. Press and hold the Power button and wait for your Mac to shut down. Boot Apple Silicon-Based Mac into Safe Mode Release the Shift key when the login screen appears on your Mac’s display.
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