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Pro Tools HD 7, Pro Tools LE 7, and Pro Tools M-Powered 7 will not run on Mac OS X 10.3.9 (Panther) and earlier.

"Tiger" Required for all versions of Pro Tools 7 on Mac OS X Sudo sysctl -w OS X Requirements with Pro Tools 6 & 7 SystemsĪfter updating either Pro Tools or your Mac OS, always run Disk Utility and "Repair Permissions" on the startup drive. Alternatively, you can use the following Terminal command (which can further be worked into a shell script): The utility Broadband Optimizer can also be used to turn off delayed acks, and places items in the Startup Folder to make the changes semi-permanent. On restarting Mac OS X, the flag gets set as the default condition and needs to be reset via Cocktail to get full speed." The speed is about half normal with the flag set as in Mac OS X 10.2.6 but goes to full with the flag reset.

I can toggle between the two states and repeat the DSL speed variation pretty much exactly. "I reset that flag and the DSL down load speed then measured at 712 Kb/s. Upon selecting the 'Network' function and then the 'Optimize' tab, I noted that the flag labeled 'Turn off delayed acks' was set. I got the utility 'Cocktail' from VersionTracker. After using Software Update on my Beige G3 desktop for Mac OS X 10.2.6 and updating my iBook to Mac OS X 10.2.6 with the combo updater, I got 399 Kb/s as the DSL download speed on both Macs. MacFixIt reader Bob Gallant writes in with a case example "Before installing Mac OS X 10.2.6, my DSL download speed was consistently 712 Kb/s as measured on the Verizon DSL speed site. Cocktail can turn off delayed acks, which the utility's documentation says "usually increases the number of packets on the network while decreasing average response time of an isolated HTTP transaction."

If you are noticing slower Internet throughput after updating to Mac OS X 10.2.6, you may be able to regain your previous speed with the aid of the all-purpose system maintenance utility, Cocktail.Īpparently, the changes made to networking components in Mac OS X 10.2.6 turned on "delayed acks" for some users, resulting in a significant speed decrease under some circumstances.