Got it, I am running 0.27.0. The thing is, it doesn’t let me update it (which is weird, because I just downloaded Julia 1.3 without explicitly imposing requirements)
Pkg.add(Pkg.PackageSpec(;name="Plots", version="0.28.2"))
Resolving package versions...
ERROR: Unsatisfiable requirements detected for package Plots [91a5bcdd]:
Plots [91a5bcdd] log:
├─possible versions are: [0.12.1-0.12.4, 0.13.0-0.13.1, 0.14.0-0.14.2, 0.15.0-0.15.1, 0.16.0, 0.17.0-0.17.4, 0.18.0, 0.19.0-0.19.3, 0.20.0-0.20.6, 0.21.0, 0.22.0-0.22.5, 0.23.0-0.23.2, 0.24.0, 0.25.0-0.25.3, 0.26.0-0.26.3, 0.27.0] or uninstalled
└─restricted to versions 0.28.2 by an explicit requirement — no versions left
Stacktrace:
[1] check_constraints(::Pkg.GraphType.Graph) at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/Pkg/src/GraphType.jl:937
[2] Pkg.GraphType.Graph(::Dict{Base.UUID,Set{VersionNumber}}, ::Dict{Base.UUID,Dict{Pkg.Types.VersionRange,Dict{String,Base.UUID}}}, ::Dict{Base.UUID,Dict{Pkg.Types.VersionRange,Dict{String,Pkg.Types.VersionSpec}}}, ::Dict{Base.UUID,String}, ::Dict{Base.UUID,Pkg.Types.VersionSpec}, ::Dict{Base.UUID,Pkg.Types.Fixed}, ::Bool) at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/Pkg/src/GraphType.jl:364
[3] deps_graph(::Pkg.Types.Context, ::Dict{Base.UUID,String}, ::Dict{Base.UUID,Pkg.Types.VersionSpec}, ::Dict{Base.UUID,Pkg.Types.Fixed}) at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/Pkg/src/Operations.jl:437
[4] resolve_versions!(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/Pkg/src/Operations.jl:320
[5] #add#112(::Bool, ::Pkg.BinaryPlatforms.MacOS, ::typeof(Pkg.Operations.add), ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}, ::Array{Base.UUID,1}) at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/Pkg/src/Operations.jl:1010
[6] #add at ./none:0 [inlined]
[7] #add#25(::Bool, ::Pkg.BinaryPlatforms.MacOS, ::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::typeof(Pkg.API.add), ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/Pkg/src/API.jl:102
[8] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/Pkg/src/API.jl:72
[9] #add#20 at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/Pkg/src/API.jl:69 [inlined]
[10] add(::Pkg.Types.PackageSpec) at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/Pkg/src/API.jl:66
[11] top-level scope at none:0