Hi, I updated to 10.5.3 first via Software Update and after reading a thread that recommended the Combo update I have tried that without any correction to my issue. Here is what the problem is. Pro Tools works fine as it's installed now, using 10.5.3 & 7.4.2 however my UAD1 software (4.10 & 4.9) at the end of the installation it runs the UA RTAS Utility scan and at that point it basically stops and doesn't scan. So because it's not scanning the UAD1 plugs are missing when I open Pro Tools...uggg. In this process of trying to get it to work I have completely un-installed both PT's and UA software, run disc utility, restarted a gazzillion times and reinstalled PT's & UA - but no luck. Any suggestions? Anyone having this issue? Work arounds? Any thing...I need to get this working. Thanks!