Booting from USB

[plyconsult]

I have a MacBook pro 2015 which has a broken screen which would be fine as I can attach an external monitor. ( except of course it was hit and miss as to when to close the macbook screen down to change it over to the monitor ! )

Anyway that would be fine but in my haste trying to delete data off the SSD I deleted the OS !!..dumb I know

Anyway when I booted up it cam up witht ? so I thought ok lets get int recovery mode

However when trying to get into recovery mode with CMD+R or CMD+R+Option I cannot get it to show on the external screen so I cant see anything

In my wisdom I thought I would follow Apple's recommendations and created a bootable usb with a compatible montrery OSX and that boots up great
If I use the disk utility I can see the 120Gb SSD fine but if I try the Install OSX option on the USB it doesnt see the SSD ..Arrggghhh

Any help please would be most appreciated


p.s. I do have a 2015 macbook air aswell if there is a way for copy an old OSX from one macbook to another

cheers

 

[plyconsult]

Here are some pics. They show all the disks I can see using the USB disk utility. The last picture is what I see when I try doing an install..as you can see I can only see the USB hard disk
Images