The error says 'Can only be done on GPT partition maps.'ĭead end everywhere. I clicked on my SSD in Disk utility, and clicked Restore. Select the device containing the disk, click the Erase button, select the Volume Scheme and then click Erase.' Well, friends, this works just fine but there is Nothing about a Partition, and the button for partition is grayed out. Use Disk Utility to change the partition scheme.

It's grayed out, and the reason given is 'This disk doesn't use the GUID Partition Table Scheme. Step 3, run the installer and try to choose the SSD. This driver provides write access for Seagate external drives in Mac OS without having to reformat. Step 2, get the High Sierra installer onto my iMac. So, step 1, format the SSD to mac OS Extended Journaled (because it came to me FAT32 MS Dos. Complete hard disk management - Covers all aspects of a Mac computer life cycle, beginning from drive partitioning and regular backup to system migration, disaster recovery and secure utilization of an outdated storage.Powerful backup and flexible recovery functions, everything you need for perfect partitioning, reliable data-wiping algorithms. (this mid 2010 iMac I'm using won't install anything higher). I bought a new 2TB SSD external, and I want to install macOS High Sierra on it. Disk doesn't use GUID Partition Table scheme I have read through many different 'answers' to this on the Support site, and none of them address my issue, so please read and help.

Paragon hard disk manager for mac