▁This ▁process ▁continues ▁until ▁no ▁one ▁respond s ▁to ▁the ▁request ▁on ▁the ▁original ▁address , ▁meaning ▁there ▁are ▁no ▁more ▁devices ▁of ▁that ▁type ▁to ▁enumerate . ▁ ▁Data ▁rates ▁on ▁the ▁bus ▁are ▁theoret ically ▁as ▁high ▁as ▁ 1 2 5 ▁k bit / s . ▁However , ▁the ▁actual ▁speed ▁is ▁at ▁best ▁half ▁that , ▁due ▁to ▁there ▁being ▁only ▁one ▁pin ▁being ▁shared ▁between ▁the ▁computer ▁and ▁devices , ▁and ▁in ▁practice , ▁through put ▁is ▁even ▁less , ▁as ▁the ▁entire ▁system ▁was ▁driven ▁by ▁how ▁fast ▁the ▁computer ▁pol ls ▁the ▁bus . ▁The ▁classic ▁Mac ▁OS ▁is ▁not ▁particularly ▁well ▁su ited ▁to ▁this ▁task , ▁and ▁the ▁bus ▁often ▁gets ▁bog ged ▁down ▁at ▁about ▁ 1 0 ▁k bit / s . ▁Early ▁Tele port ▁mode ms ▁running ▁at ▁ 2 4 0 0   bit / s ▁have ▁no ▁problems ▁using ▁Apple ▁Des ktop ▁Bus , ▁but ▁later ▁models ▁were ▁forced ▁to ▁move ▁to ▁the ▁more ▁expensive ▁R S - 4 2 2 ▁ports ▁as ▁spe eds ▁moved ▁to ▁ 1 4 . 4   k bit / s ▁and ▁higher . ▁ ▁Problem s ▁ ▁While ▁M ini - D IN ▁connect ors ▁cannot ▁be ▁plug ged ▁in ▁the ▁" wr ong ▁way ", ▁it ▁is ▁possible ▁to ▁have ▁trouble ▁finding ▁the ▁right ▁way ▁without ▁looking ▁inside ▁the ▁circular ▁conne ctor ' s ▁shr oud . ▁Apple ▁attempted ▁to ▁help ▁by ▁using ▁U - sh aped ▁soft ▁pl astic ▁g