If you don't know what to do when your lacie hard drive not showing up mac then read this post carefully. Here you will get full information about it. Basically the lacie hard drive is an external hard drive which you can connect with your Mac system or Windows system. But as you are a Mac user so i am going to make you aware that number of peoples who connects the lacie hard drive with their Mac system got a common issue lacie hard drive not showing up Mac. The lacie hard drive is manufactured by French company. It comes with various data storage capacity like 1TB, 2 TB, etc. You should know that not connecting and ejecting the hard drive from your Mac system will results to lacie hard drive not showing up Mac. Sometimes user will accidentally disconnect the hard drive from system when the file transfer process is in going on. Hence this also cause disappearance of hard drive in system. You are advised to do not disconnect the hard drive without unmounting from system because this will corrupt the file system of hard drive and also leads to hard drive disappearance in system. Hence if lacie hard drive not showing up Mac and this situation causes data loss issue then take help of Mac data recovery software. This is an easy solution to recover all lost data without putting your much effort.