how to format drive mac install os x el capitan

That should only take a few seconds to complete, then quit Disk Utility, then choose Reinstall OS X.

If your hard drive now has a free space partition -įormat (erase) that free space, formatting as OS X Extended (Journaled) But when trying to make a boot-USBstick with iPartion on it the program crashes. Tried the old iPartition but it says it can not delete from the boot disk. Also tried Command+R Disk Utility, but it starts the utility of Capitan, not that of HS. The problem is, I can not delete the APFS partition from within El Capitan and I also can not boot back into HS.Ĭapitan's disk utility sees the APFS partition as unknown type and can do nothing with it, not even delete it. Played around for some time with High Sierra but decided the speed is lower than with El Capitan and decided to abandon it. As I wanted to test APFS, I did a conversion. But it had formatted his partition with HFS+ (thought it will go automatically to APFS). Reduced the Capitan partition and in the free space I installed HS. For comparison purpose I installed High Sierra onto my mid2011 iMac along with the existing El Capitan.

How to format drive mac install os x el capitan