I love Mac but one issue that keeps me from making the full switch to Apple Macs for our home computers is the poor support for Arabic fonts. One recurring issue revolves around Arabic letters appearing disjointed which makes it hard to read when one is used seeing the letters in the words connected together in their various forms.
The reason for the appearance of disjointed letters varies but is common after installing Microsoft Office for Mac. A complete install of Office includes about 70 fonts. Disabling the Microsoft Office Arial and Times New Roman fonts in the Font Book should clear up the disjointed letters issue in most applications although sometimes the issue is more complex.
After reviewing just how many fonts I use on a regular basis which total about 5, I decided to delete all of the fonts installed in my local user directory by Microsoft Office and reverted to the default Mac fonts that are located in my system folder and this also cleared up the disjointed letter issue.
Occasionally though in PowerPoint presentations, Arabic sentences become jumbled such that the words at the end of a sentence come before the words at the beginning. The PowerPoint presentation displays correctly on my PC so I have yet to locate the exact issue with the Mac.