How do I put space key back on?

bcarol wrote:

I pulled the space key off my MB pro because it was sticking and can't get it reattached. help please

You do not say what exact Mac /model /year /size /retina /touchbar is this ?

See if you qualify here: https://www.apple.com/support/keyboard-service-program-for-macbook-and-macbook-pro/

These keys can be very fragile the mechanism underneath.

Any Apple store could help you, a free over the counter 'Apple Service Diagnostics' /assessment

Make an appointment for a hardware issue—

https://www.apple.com/retail/geniusbar/