Retina 5K 27-inch iMac, 3.6GHz 8-Core Intel Core i9, 64GB 2556 MHz DDR4 RAM, macOS Catalina 10.15.7 :

{"MachineName" -> "blackstone", 
 "System" -> "Mac OS X x86 (64-bit)", 
 "BenchmarkName" -> "WolframMark", 
 "FullVersionNumber" -> "12.1.1", 
 "Date" -> "November 27, 2020", 
 "BenchmarkResult" -> 4.85, 
 "TotalTime" -> 2.854, 
 "Results" -> {{"Data Fitting", 0.191}, 
   {"Digits of Pi", 0.187}, 
   {"Discrete Fourier Transform", 0.203}, 
   {"Eigenvalues of a Matrix", 0.234}, 
   {"Elementary Functions", 0.168}, 
   {"Gamma Function", 0.255}, 
   {"Large Integer Multiplication", 0.258}, 
   {"Matrix Arithmetic", 0.108}, 
   {"Matrix Multiplication", 0.097}, 
   {"Matrix Transpose", 0.161}, 
   {"Numerical Integration", 0.315}, 
   {"Polynomial Expansion", 0.042}, 
   {"Random Number Sort", 0.358}, 
   {"Singular Value Decomposition", 0.14}, 
   {"Solving a Linear System", 0.137}}}