The following command assumes that the GRUB install is in /efi/grub on an existing OS X partition: # bless -folder /efi/grub -file /efi/grub/grub. Plug your USB drive into your computer, and open TransMac. The guide above will work in most cases, if it doesn't, you can find help here. Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions. A substantial number of MacBook Pro owners have been plagued by system freezes after installing Apple’s latest OS X El Capitan update.Once that is complete, exit disk utility. The DVD drive in the MacBook is faulty so I imaged the Snow Leopard DVD onto a USB drive using. Two options are to use Duplicate (a free utility which can copy and paste an entire bootable volume), or Mac Backup Guru (a paid, fully featured backup utility with unique incremental backups capability) for that. I am trying to build an image of an ML model deployed on a Flask application. Even so, it’s a good idea to review our Rocket Yard guides for a clean install of macOS Catalina as well as an upgrade install of Catalina. The rm is the remove (or delete) command and.