Mac Pro (retina, 13 inch, late 2013) after clean installation try to reinstall os x, not working msg: Apple.com/support -3001F has come up?? When restarts a grey folder with question now appears

For " When restarting a grey folder with question now appears. Had to clean and reinstall because App Store and other apps were not responding? " see

A flashing question mark or globe appears when you start your Mac - Apple Support

Try resetting the SMC and NVRAM

Intel-based Macs: Resetting the System Management Controller (SMC)

About NVRAM and PRAM

Repair the startup disk via disk utility since maybe the disk is bad.

Try running Apple hardware test since yo may have a hardware problem

Using Apple Hardware Test - Apple Support

This is the Mac Pro desktop forum. I requested your post be moved to the MacBook Pro laptop forum.