Sorry - I had (and indeed still have) a Spectrum 48K+ and while it was a great games machine (as well as a classic starting point for the would-be programmer) it was pretty terrible as a productivity machine.
The keyboard was useless for typing; the printer connectivity was via a towering expansion module that was positioned an inch away from the top-row of the keyboard and would crash the machine if it got knocked; there was no decent floppy drive available in the early years and the Microdrives combined tiny capacity (85K) with comical levels of reliability; the screen was very low resolution 256x192 (better than a C64 mind you) and had the attribute overlay issue; the nail in the coffin was a CPU that made Vu-3D unbelievably slow, even when rendering the most simplistic of scenes. At least a year of my childhood was wasted waiting for the Speccy to wheeze its way through simple, monochrome, images that contained fewer pixels than modern application icons.
The big thing about MacPaint was that it integrated with the other applications on the machine. You could draw something in paint and use it in MacWrite. There was no such facility on the Spectrum; you could not draw an image in Art Studio and paste it in to Tasword. The Speccy was the best home computer of the early eighties, but a player in the home office market it was not.