Did exactly this 5 most ago. Had a 21" iMac wi 8gb RAM from 2011. Last fall I traded my Nikon D810 for the new Z7 and the change from 36mp to 45mp files was equivalent to putting molasses in my system. Using lightroom my slowest process was doing HDRs with three raw files with a base exposure plus two stops over and two stops under. It took 4-5 minutes with the D810 files and moved to 30-40 minutes with the Z7 files. In December I pulled the trigger on a new 27" iMac (the 3.1 Ghz model as I could add up to 64gb memory) . I stuck with the Fusion drive as I never had an issue with any previous Mac (had five over the years) and I did recently add a 2Tb SSD drive used exclusively for my photos. I configured the Mac with only 8Gb memory because I found that I could buy 32Gb of memory online from OWC(Other World Computing) for $325 less than Apple. It comes as 2 16Gb chips and is a piece of cake to install. If you do not already have one I would highly recommend the Apple Time Machine. It is a 2 or 3 TB hard drive with built in WiFi and automatic connection to iCloud. When installed it will automatically back up you entire system, including external hard drives, every ten minutes while operating your system. This item is no longer in production but the rep when I got my new system said Apple still had plenty of stock and still selling new units. Before I installed my new iMac I purged my full system of duplicates and unwanted files and did a final backup. When I set up the new Mac all I had to do was initiate a "Restore" from my Time Machine and in 40 minutes I was up and running. It screams- HDRs that took 30 minutes are now done in 30 seconds! Best move I made in years. Pat
picsman wrote:
Having been an Apple universe consumer I now need to upgrade my iMac (2013). I take mainly amateur sports pix and can have 4,000 to process in a single batch. I have found Capture One (v11) to give me the fastest processing incorporating auto adjust and style additions on uploads from my Nikon D750 RAW files. These files are all kept on an external hard drive.
On occasions I will have open half a dozen or so applications, eg mail, browser, capture one, DxO, Nik, photoshop or affinity.
Apple have a new 27" mac, what specs does anyone recommend?
Having been an Apple universe consumer I now need ... (
show quote)