Printing to my HP Laserjet 1320 is very slow from ID CS6 (V 8.0.1) and other Adobe apps on my new iMac running OS 10.11.6. About 4 to 5 minutes before printing begins, even on text-only pages. The printing was just fine from CS6 to the same printer on the old computer, MacPro running Snow Leopard. Both new and old computers have 8 GB memory. Any ideas?
InDesign CS6 is not supported under El Capitan. You'd be best advised to upgrade to InDesign CC2015.
Yes, I could do that, but my main client wants CS6 files. I need to do the best I can with CS6.
You need to either revert your OS or supply him with IDML files.