!st, apologies for not starting a brand new message thread. Some of the hardware issues were in the original topic discussion, so I’ve decided to (I hope) let the server software keep them linked.

Continuing various tests on launch times for SEE Finance related to last restart of my iMac, number of other applications open, etc., I’ve decided that, when I have time, I’m going to replace my Fusion Drive with a PCI-e express 1 TB SSD as my boot volume, possibly replace my 1 TB 5800 RPM internal drive with a SATA SSD, and boost the RAM to 32 GB. The SSD-SATA drive decision isn’t firm yet, with the greatest incentive being never to have to do this again.

I’m thinking this will extend the useful life of my iMac for many years, although I know I’ll miss 10 Gbit Ethernet, next gen WiFi, and possibly other advances.

OWC’s instructional videos are quite detailed, and also quite reassuring as regards my ability to do the work.

I may partition the SATA-SSD into either a native Windows boot version or install the deeply discounted version of Parallels that OWC sells there along with Mojave.

I’m assuming that if I install a SATA 2.5” form factor SSD where the rotating platter drive is now, the iMac will recognize it as bootable.

Have any list members done this surgery themselves? It looks tedious, but not dangerous (but then, I’ve never priced replacement iMac display modules from Apple).

If any of you have done a rotating platter to SATA SSD upgrade, how would you characterize the performance boost?

Thanks so much,

Jim Robertson