Format of tag file, can be "ELAND", "BED", "ELANDMULTI", "ELANDEXPORT", "ELANDMULTIPET" (for pair-end tags), "SAM", "BAM", "BOWTIE", "BAMPE" or "BEDPE". Default is "AUTO" which will allow MACS to decide the format automatically. "AUTO" is also usefule when you combine different formats of files. Note that MACS can't detect "BAMPE" or "BEDPE" format with "AUTO", and you have to implicitly specify the format for "BAMPE" and "BEDPE".
The BED format can be found at UCSC genome browser website.
I think the BED is supported