Create a bootable macOS installer on your SSD, boot from it, select 'Install macOS,' and select your external SSD as the destination disk. Boot into macOS Recovery, click 'Reinstall macOS,' then select your external SSD as the destination disk.

Delete the installer from the Applications folder, redownload it, run it, and select your external SSD as the destination disk. If you still can't run your Mac from the external SSD, I recommend you erase it in Disk Utility and retry installing macOS on it through your Mac Studio, but with a different method or a newer macOS version like Ventura.Ĭhoose one of the following ways to install macOS on your external SSD: Basically other is all files you don’t own. Other is fairly hard to track down but it’s possible. Dont worry, you wont loose your data doing this as it merely overwrites the OS, it doesnt overwrite your files. ③ Start over and retry installing macOS to your SSD Welcome to macOSs miserable file management. ② Switch your startup disk from System Preferences/SettingsĪpart from selecting the startup disk by long pressing the power button, you can boot up from your internal hard drive and change it from System Preferences > Startup Disk on macOS Monterey. The option isn't available on M1 & M2 Macs. Delete files or take further action, depending on what you choose. Now go through each of the sections in the sidebar. In the Recommendations section, review each section in turn. Note: For those who receive 'Unable to set startup disk SDErrorDomian error 108' on T2 Macs, ensure your Mac is set to allow booting from external or removable media in Startup Security Utility. Click on the Apple menu and choose About this Mac.

Macbook not enough disk space