I installed the 2021.2 update just now on an early 2011 13" MBP w/i7, 16GB, 512GB SSD (yes, a more than 10 year old Mac, albeit upgraded by me a while back). Also, macOS version 10.13.6.

So far everything working fine. Data links to an external Excel spreadsheet are good, but I'm not doing anything heavy like bringing in large xrefs or 3D at the moment.