While it's common for presidents to receive gifts, there are rules and regulations around what they can accept.
While the Mac Pro is a costly gift, it's the baseline cost of the current 2020 model. That is earlier than you think about a $999 Professional stand and different bells and whistles like $5,999 for a 32-inch Professional Show XDR with Retina 6K show and $25,00zero for 1.5 TB of reminiscence. All in, a Mac Pro can cost up to $62,571.
The gift probably received the gift in November 2019, when he visited the factory accompanied by Apple CEO Tim Cook.
In recent weeks, Cook - who held a fundraiser for Hillary Clinton in 2016 - appears to have distanced himself from Trump in the wake of the attack on the Capitol. Relations between the Trump administration and Apple were troubled throughout the administration: both met a few times, including to talk about privacy, and the former president had as one of the campaign platforms the transfer of factories from the company to the United States of America - something that was not always respected by Cook. Cook has also spoken out against Trump's immigration policies.