Update, April 28 1:12 a.m. ET:  Apple reached out to 9to5Mac with more information, which you can find below the original post. Following Apple’s decision to close its first-ever unionized store, the International Association of Machinists and Aerospace Workers (IAM Union) has filed an unfair labor practice charge with the National Labor Relations Board. Here are the details. Apple accused of union busting Earlier this month, Apple announced its decision to close three stores: Apple Towson Town Center in Towson (MD), Apple North County in Escondido (CA), and Apple Trumbull in Trumbull (CT). In all three cases, the company said it had reached the decision after citing declining conditions and the departure of other retailers at the malls where the stores are located. After the news broke, the decision to shut down Apple Towson Town Center quickly drew the most attention, as it was the first Apple retail store in the U.S. to unionize.…