Home > Questions

Can't select disk to reinstall macOS, why?

When I set up Mojave, Catalina, High Sierra, or Big Sur on my VirtualBox virtual system. I have a problem where I am unable to choose the target disk for the Mac OS installation.

Best Answered by

iBoysoft author Amanda Wong

Amanda Wong

Answered on Monday, February 19, 2024

When the Select disk where to install macOS window is blank, you can't continue to macOS reinstallation. The target internal hard drive or the external hard drive could be corrupted or be in the wrong file format. You can repair the drive, or even reformat the disk, and then try to reinstall macOS again. 

If you are going to reinstall macOS on Mac's internal hard drive Macintosh HD, but it doesn't show up to let you select, the drive could be corrupted, try to boot Mac into macOS Recovery Mode, access Disk Utility, and run First Aid to check and repair the disk. If this doesn't work, back up the Mac drive with Time Machine, recover data from Macintosh HD, and then reformat it in macOS Recovery Mode.

Read more: Recover Data From Your Unbootable Mac in macOS Recovery Mode

If it is an external hard drive where you want to reinstall macOS, make sure you have allowed your Mac to boot from external media in Startup Security Utility. Besides, the drive should be formatted with a macOS-supported file system such as APFS, HFS+, exFAT, and FAT32. If the external hard drive still does not show up in the "Select disk where to install macOS" window, repair the drive, recover data with iBoysoft Data Recovery for Mac, and reformat it.

People Also Ask

Read More Questions

Read More Advice From iBoysoft's Computer Experts

Como atualizar para o macOS Sonoma

Guia completo: Atualização para macOS Sonoma (14)

macOS Sonoma (14) é a versão mais recente do macOS e este post mostra como atualizar para o macOS 14 e como corrigir se você falhar na atualização no seu Mac/MacBook.

cómo instalar macOS en un nuevo SSD

Cómo instalar macOS en un nuevo SSD [2 métodos incluidos]

Si encuentras un tutorial sobre cómo instalar macOS en un nuevo SSD, estás en el lugar correcto. Este artículo te guía para instalar macOS en un nuevo SSD con instrucciones detalladas. ¡Sigue leyendo!

Downgrade macOS Ventura auf macOS Monterey

Vollständiger Leitfaden, wie man macOS Ventura auf Monterey zurückstufen kann.

Dieser Artikel bietet Ihnen drei spezifische Möglichkeiten, wie Sie macOS Ventura auf macOS Monterey zurückstufen können, einschließlich der Verwendung eines Time Machine-Backups, des macOS-Wiederherstellungsmodus und eines bootfähigen Installationsprogramms.