I normally don't interject in posts like this, and I will in most likely not respond to any on this topic after this. First off, as already been stated, President Trump has no authority or ability to force Apple or any other non-federal business to intact his Executive Orders, period. So no matter what he puts on social media, or other platforms, he cannot force businesses to dismantle their DEI programs.
Secondly, the problem with many DEI programs is that they are technically unnecessary in the US and are often implemented in a way that discriminates in favor of protected persons. They are not necessary as we already have laws in place that make it illegal to discriminate against anyone. We also have laws that make it illegal to purposefully harass and treat people poorly. These of course target businesses, and not individuals. The current problem is that people now get hired or preferential treatment because they have protected status (which is not granted via DEI policies, but the normal anti-discrimination and anti-harassment laws already in place), not because of their performance or ability to do the job. What President Trump is trying to do for the Federal workforce is do what the late, great Dr. King said, judge people not by their physical attributes, but by the content of their character. We need diversity, the US is a melting-pot with tons of diverse people, cultures, and experiences. Our diversity is what makes America great. What we don't need is hypocritical policies that result in the opposite of what they proclaim to promote.